125215520 has 48 divisors (see below), whose sum is σ = 302133888. Its totient is φ = 49017600.

The previous prime is 125215499. The next prime is 125215583. The reversal of 125215520 is 25512521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806 + ... + 15845.

It is an arithmetic number, because the mean of its divisors is an integer number (6294456).

Almost surely, 2^125215520 is an apocalyptic number.

125215520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125215520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151066944).

125215520 is an abundant number, since it is smaller than the sum of its proper divisors (176918368).

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

125215520 is a wasteful number, since it uses less digits than its factorization.

125215520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16713 (or 16705 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 125215520 is about 11189.9740839736. The cubic root of 125215520 is about 500.2871950065.

The spelling of 125215520 in words is "one hundred twenty-five million, two hundred fifteen thousand, five hundred twenty".