125170728 has 128 divisors (see below), whose sum is σ = 349920000. Its totient is φ = 37130240.

The previous prime is 125170709. The next prime is 125170739. The reversal of 125170728 is 827071521.

It is a super-2 number, since 2×125170728² = 31335422296099968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 839998 + ... + 840146.

It is an arithmetic number, because the mean of its divisors is an integer number (2733750).

Almost surely, 2^125170728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125170728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174960000).

125170728 is an abundant number, since it is smaller than the sum of its proper divisors (224749272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125170728 is a wasteful number, since it uses less digits than its factorization.

125170728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 125170728 is about 11187.9724704702. The cubic root of 125170728 is about 500.2275337744.

The spelling of 125170728 in words is "one hundred twenty-five million, one hundred seventy thousand, seven hundred twenty-eight".