125657163 has 40 divisors (see below), whose sum is σ = 193406400. Its totient is φ = 81274752.

The previous prime is 125657141. The next prime is 125657209. The reversal of 125657163 is 361756521.

125657163 is a `hidden beast` number, since 1 + 25 + 6 + 571 + 63 = 666.

It is not a de Polignac number, because 125657163 - 2⁶ = 125657099 is a prime.

It is a super-2 number, since 2×125657163² = 31579445226417138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125657113) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 466993 + ... + 467261.

It is an arithmetic number, because the mean of its divisors is an integer number (4835160).

Almost surely, 2^125657163 is an apocalyptic number.

125657163 is a deficient number, since it is larger than the sum of its proper divisors (67749237).

125657163 is an equidigital number, since it uses as much as digits as its factorization.

125657163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 424 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 125657163 is about 11209.6905844898. The cubic root of 125657163 is about 500.8746862889.

The spelling of 125657163 in words is "one hundred twenty-five million, six hundred fifty-seven thousand, one hundred sixty-three".