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172 (one hundred [and] seventy-two) is the natural number following 171 and preceding 173.

← 171 172 173 →
Cardinalone hundred seventy-two
Ordinal172nd
(one hundred seventy-second)
Factorization22 × 43
Divisors1, 2, 4, 43, 86, 172
Greek numeralΡΟΒ´
Roman numeralCLXXII
Binary101011002
Ternary201013
Quaternary22304
Quinary11425
Senary4446
Octal2548
Duodecimal12412
HexadecimalAC16
Vigesimal8C20
Base 364S36

In mathematicsEdit

172 is an even number, a composite number and a deficient number. It is also a 30-gonal number.[1]

172 is a noncototient integer,[2] as well as the sum of Euler's totient function φ(x) over the first twenty-three integers. 172 is also a member of the Lazy Caterer's Sequence.[3]

172 is a repdigit in base 6 (444), as well as in bases 42, 85, and 171.

In the militaryEdit

In sportsEdit

In transportationEdit

In other fieldsEdit

172 is also:

See alsoEdit

External linksEdit

ReferencesEdit

  1. ^ "Sloane's A254474 : 30-gonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-26.
  2. ^ "Sloane's A005278 : Noncototients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-26.
  3. ^ "Sloane's A000124 : Central polygonal numbers (the Lazy Caterer's sequence)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-26.