125513520 has 80 divisors (see below), whose sum is σ = 424472832. Its totient is φ = 30426880.

The previous prime is 125513503. The next prime is 125513551. The reversal of 125513520 is 25315521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21132 + ... + 26411.

Almost surely, 2^125513520 is an apocalyptic number.

125513520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125513520 is an abundant number, since it is smaller than the sum of its proper divisors (298959312).

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

125513520 is a wasteful number, since it uses less digits than its factorization.

125513520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47570 (or 47564 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 125513520 is about 11203.2816620846. The cubic root of 125513520 is about 500.6837578575.

The spelling of 125513520 in words is "one hundred twenty-five million, five hundred thirteen thousand, five hundred twenty".