125215920 has 120 divisors (see below), whose sum is σ = 427560432. Its totient is φ = 32832000.

The previous prime is 125215919. The next prime is 125215949. The reversal of 125215920 is 29512521.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42495 + ... + 45345.

Almost surely, 2^125215920 is an apocalyptic number.

125215920 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 125215920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213780216).

125215920 is an abundant number, since it is smaller than the sum of its proper divisors (302344512).

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

125215920 is a wasteful number, since it uses less digits than its factorization.

125215920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931 (or 2922 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 125215920 is about 11189.9919571017. The cubic root of 125215920 is about 500.2877277271.

The spelling of 125215920 in words is "one hundred twenty-five million, two hundred fifteen thousand, nine hundred twenty".