# 100,000

100,000 (one hundred thousand) is the natural number following 99,999 and preceding 100,001. In scientific notation, it is written as 105.

 ← 99999 100000 100001 →
Cardinalone hundred thousand
Ordinal100000th
(one hundred thousandth)
Factorization25 × 55
Greek numeral${\stackrel {\iota }{\mathrm {M} }}$ Roman numeralC
Binary110000110101000002
Ternary120020112013
Octal3032408
Duodecimal49A5412

## Terms for 100,000

In India, Pakistan and South Asia, one hundred thousand is called a lakh, and is written as 1,00,000. The Thai, Lao, Khmer and Vietnamese languages also have separate words for this number: แสน, ແສນ, សែន (all saen), and ức respectively. The Malagasy word is hetsy.

In Cyrillic numerals, it is known as the legion (легион):   or  .

## Values of 100,000

In astronomy, 100,000 metres, 100 kilometres, or 100 km (62 miles) is the altitude at which the Fédération Aéronautique Internationale (FAI) defines spaceflight to begin.

In the Irish language, céad míle fáilte (pronounced [ˌceːd̪ˠ ˈmʲiːlʲə ˈfˠaːlʲtʲə]) is a popular greeting meaning "a hundred thousand welcomes".

## Selected 6-digit numbers (100,001–999,999)

### 100,001 to 199,999

#### 150,000 to 199,999

• 152,381 = unique prime in base 20
• 156,146 = Keith number
• 160,000 = 204
• 161,051 = 115
• 161,280 = highly totient number
• 166,320 = highly composite number
• 167,400 = harmonic divisor number
• 167,894 = number of ways to partition {1,2,3,4,5,6,7,8} and then partition each cell (block) into subcells.
• 173,600 = harmonic divisor number
• 174,680 = Keith number
• 174,763 = Wagstaff prime
• 177,147 = 311
• 177,777 = smallest natural number requiring 19 syllables in American English, 21 in British English
• 178,478 = Leyland number
• 181,440 = highly totient number
• 181,819 = Kaprekar number
• 183,186 = Keith number
• 183,231 = number of partially ordered set with 9 unlabeled elements
• 187,110 = Kaprekar number
• 194,481 = 214
• 195,025 = Pell number, Markov number
• 196,418 = Fibonacci number, Markov number
• 196,560 = the kissing number in 24 dimensions
• 196,883 = the dimension of the smallest nontrivial irreducible representation of the Monster group
• 196,884 = the coefficient of q in the Fourier series expansion of the j-invariant. The adjacency of 196883 and 196884 was important in suggesting monstrous moonshine.

### 200,000 to 299,999

• 202,717 = k such that the sum of the squares of the first k primes is divisible by k.
• 206,098Large Schröder number
• 206,265 = rounded number of arc seconds in a radian (see also parsec), since 180 × 60 × 60/π = 206,264.806...
• 207,360 = highly totient number
• 208,012 = the Catalan number C12
• 208,335 = the largest number to be both triangular and square pyramidal
• 208,495 = Kaprekar number
• 212,159 = smallest unprimeable number ending in 1, 3, 7 or 9
• 221,760 = highly composite number
• 222,222 = repdigit
• 227,475 = Riordan number
• 234,256 = 224
• 237,510 = harmonic divisor number
• 238,591 = number of free 13-ominoes
• 241,920 = highly totient number
• 242,060 = harmonic divisor number
• 248,832 = 100,00012, AKA a gross-great-gross (10012 great-grosses);125, the smallest fifth power that can be represented as the sum of only 6 fifth powers: 125 = 45 + 55 + 65 + 75 + 95 + 115
• 262,144 = 218; exponential factorial \$4 of 4; a superperfect number
• 262,468 = Leyland number
• 268,705 = Leyland number
• 274,177 = prime factor of the Fermat number F6
• 275,807/195,025 ≈ √2
• 277,200 = highly composite number
• 279,841 = 234
• 279,936 = 67
• 280,859 = a prime number whose square 78881777881 is tridigital
• 293,547 = Wedderburn–Etherington number
• 294,001 = smallest weakly prime number in base 10
• 294,685 = Markov number
• 298,320 = Keith number

### 300,000 to 399,999

• 310,572 = Motzkin number
• 317,811 = Fibonacci number
• 318,682 = Kaprekar number
• 325,878 = Fine number
• 326,981 = alternating factorial
• 329,967 = Kaprekar number
• 331,776 = 244
• 332,640 = highly composite number; harmonic divisor number
• 333,333 = repdigit
• 333,667 = sexy prime and unique prime
• 333,673 = sexy prime with 333,679
• 333,679 = sexy prime with 333,673
• 337,500 = 22 × 33 × 55
• 351,351 = only known odd abundant number that is not the sum of some of its proper, nontrivial (i.e. >1) divisors (sequence A122036 in the OEIS).
• 351,352 = Kaprekar number
• 355,419 = Keith number
• 356,643 = Kaprekar number
• 360,360 = harmonic divisor number; the smallest number divisible by all of the numbers 1 through 15
• 362,880 = 9!, highly totient number
• 370,261 = first prime followed by a prime gap of over 100
• 371,293 = 135, palindromic in base 12 (15AA5112)
• 389,305 = self-descriptive number in base 7
• 390,313 = Kaprekar number
• 390,625 = 58
• 397,585 = Leyland number

### 400,000 to 499,999

• 409,113 = sum of the first nine factorials
• 422,481 = smallest number whose fourth power is the sum of three smaller fourth powers
• 423,393 = Leyland number
• 426,389 = Markov number
• 426,569 = cyclic number in base 12
• 437,760 to 440,319 = any of these numbers will cause the Apple II+ and Apple IIe computers to crash to a monitor prompt when entered at the BASIC prompt, due to a short-cut in the Applesoft code programming of the overflow test when evaluating 16-bit numbers. Entering 440000 at the prompt has been used to hack games that are protected against entering commands at the prompt after the game is loaded.
• 444,444 = repdigit
• 456,976 = 264
• 461,539 = Kaprekar number
• 466,830 = Kaprekar number
• 470,832 = Pell number
• 483,840 = highly totient number
• 498,960 = highly composite number
• 499,393 = Markov number
• 499,500 = Kaprekar number

### 500,000 to 599,999

• 500,500 = Kaprekar number, sum of first 1,000 integers
• 509,203 = Riesel number
• 510,510 = the product of the first seven prime numbers, thus the seventh primorial. It is also the product of four consecutive Fibonacci numbers—13, 21, 34, 55, the highest such sequence of any length to be also a primorial. And it is a double triangular number, the sum of all even numbers from 0 to 1428.
• 514,229 = Fibonacci prime, Markov prime
• 518,859 = little Schroeder number
• 524,287 = Mersenne prime
• 524,288 = 219
• 524,649 = Leyland number
• 525,600 = minutes in a non-leap year
• 527,040 = minutes in a leap year
• 531,441 = 312
• 533,169 = Leyland number
• 533,170 = Kaprekar number
• 537,824 = 145
• 539,400 = harmonic divisor number
• 548,834 = equal to the sum of the sixth powers of its digits
• 554,400 = highly composite number
• 555,555 = repdigit

### 600,000 to 699,999

• 604,800 = number of seconds in a week
• 614,656 = 284
• 625,992 = Riordan number
• 646,018 = Markov number
• 664,579 = the amount of primes under 10,000,000 there are
• 665,280 = highly composite number
• 665,857/470,832 ≈ √2
• 666,666 = repdigit
• 676,157 = Wedderburn–Etherington number
• 678,570 = Bell number
• 694,280 = Keith number
• 695,520 = harmonic divisor number

### 800,000 to 899,999

• 810,000 = 304
• 823,543 = 77
• 825,265 = smallest Carmichael number with 5 prime factors
• 832,040 = Fibonacci number
• 853,467 = Motzkin number
• 857,375 = 953
• 873,612 = 11 + 22 + 33 + 44 + 55 + 66 + 77
• 888,888 = repdigit
• 890,625 = 1-automorphic number