125 (number)
125 is the natural number following 124 and preceding 126.
In mathematics
[Image:5cube.svg|300px|top]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.
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.
125 is the center of a close triplet of perfect powers,. Excluding the trivial cases of 0 and 1, the only closer such triplet is and the only other equally close is.