125690728 has 32 divisors (see below), whose sum is σ = 238752360. Its totient is φ = 62030080.

The previous prime is 125690723. The next prime is 125690731. The reversal of 125690728 is 827096521.

It can be written as a sum of positive squares in 4 ways, for example, as 124947684 + 743044 = 11178^2 + 862^2 .

It is not an unprimeable number, because it can be changed into a prime (125690723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272418 + ... + 272878.

Almost surely, 2^125690728 is an apocalyptic number.

It is an amenable number.

125690728 is a deficient number, since it is larger than the sum of its proper divisors (113061632).

125690728 is a wasteful number, since it uses less digits than its factorization.

125690728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 125690728 is about 11211.1876266522. The cubic root of 125690728 is about 500.9192794813.

The spelling of 125690728 in words is "one hundred twenty-five million, six hundred ninety thousand, seven hundred twenty-eight".