125 (number)

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← 124 125 126 →
Cardinal one hundred twenty-five
Ordinal 125th
(one hundred twenty-fifth)
Factorization 53
Divisors 1, 5, 25, 125
Greek numeral ΡΚΕ´
Roman numeral CXXV
Binary 11111012
Ternary 111223
Quaternary 13314
Quinary 10005
Senary 3256
Octal 1758
Duodecimal A512
Hexadecimal 7D16
Vigesimal 6520
Base 36 3H36

125 (one hundred [and] twenty-five) is the natural number following 124 and preceding 126.

In mathematics[edit]

5cube.svg

125 is the cube of 5. It can be expressed as a sum of two squares in two different ways, 125 = 10² + 5² = 11² + 2².[1]

125 and 126 form a Ruth-Aaron pair under the second definition in which repeated prime factors are counted as often as they occur.

Like many other powers of 5, it is a Friedman number in base 10 since 125 = 51 + 2.

U.S. military[edit]

In transportation[edit]

In other fields[edit]

125 is also:

See also[edit]

References[edit]

  1. ^ Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 136