125657656 has 8 divisors (see below), whose sum is σ = 235608120. Its totient is φ = 62828824.

The previous prime is 125657639. The next prime is 125657677. The reversal of 125657656 is 656756521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×125657656² = 31579693022828672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7853596 + ... + 7853611.

It is an arithmetic number, because the mean of its divisors is an integer number (29451015).

Almost surely, 2^125657656 is an apocalyptic number.

It is an amenable number.

125657656 is a deficient number, since it is larger than the sum of its proper divisors (109950464).

125657656 is a wasteful number, since it uses less digits than its factorization.

125657656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15707213 (or 15707209 counting only the distinct ones).

The product of its digits is 378000, while the sum is 43.

The square root of 125657656 is about 11209.7125743705. The cubic root of 125657656 is about 500.8753413275.

The spelling of 125657656 in words is "one hundred twenty-five million, six hundred fifty-seven thousand, six hundred fifty-six".