725520 has 40 divisors (see below), whose sum is σ = 2249856. Its totient is φ = 193408.

The previous prime is 725519. The next prime is 725531. The reversal of 725520 is 25527.

It is a tau number, because it is divible by the number of its divisors (40).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272 + ... + 1751.

2⁷²⁵⁵²⁰ is an apocalyptic number.

It is an amenable number.

725520 is an abundant number, since it is smaller than the sum of its proper divisors (1524336).

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

725520 is a wasteful number, since it uses less digits than its factorization.

725520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 725520 is about 851.7746180769. The cubic root of 725520 is about 89.8565616386.

The spelling of 725520 in words is "seven hundred twenty-five thousand, five hundred twenty".