125139028 has 24 divisors (see below), whose sum is σ = 250516224. Its totient is φ = 53580000.

The previous prime is 125139019. The next prime is 125139029. The reversal of 125139028 is 820931521.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125139029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52053 + ... + 54403.

It is an arithmetic number, because the mean of its divisors is an integer number (10438176).

Almost surely, 2^125139028 is an apocalyptic number.

It is an amenable number.

125139028 is an abundant number, since it is smaller than the sum of its proper divisors (125377196).

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

125139028 is a wasteful number, since it uses less digits than its factorization.

125139028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263 (or 4261 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 125139028 is about 11186.5556808161. Note that the first 3 decimals coincide. The cubic root of 125139028 is about 500.1853019845.

The spelling of 125139028 in words is "one hundred twenty-five million, one hundred thirty-nine thousand, twenty-eight".