125000520 has 32 divisors (see below), whose sum is σ = 375001920. Its totient is φ = 33333440.

The previous prime is 125000509. The next prime is 125000521. The reversal of 125000520 is 25000521.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 125000520.

It is not an unprimeable number, because it can be changed into a prime (125000521) 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, 520716 + ... + 520955.

It is an arithmetic number, because the mean of its divisors is an integer number (11718810).

Almost surely, 2^125000520 is an apocalyptic number.

125000520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125000520 is an abundant number, since it is smaller than the sum of its proper divisors (250001400).

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

125000520 is a wasteful number, since it uses less digits than its factorization.

125000520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041685 (or 1041681 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 125000520 is about 11180.3631425817. The cubic root of 125000520 is about 500.0006933324. Note that the first 3 decimals are identical.

Subtracting from 125000520 its reverse (25000521), we obtain a palindrome (99999999).

The spelling of 125000520 in words is "one hundred twenty-five million, five hundred twenty", and thus it is an aban number.