725508 has 36 divisors (see below), whose sum is σ = 2096640. Its totient is φ = 207216.

The previous prime is 725507. The next prime is 725519. The reversal of 725508 is 805527.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (725507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1188 + ... + 1691.

It is an arithmetic number, because the mean of its divisors is an integer number (58240).

2⁷²⁵⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

725508 is an abundant number, since it is smaller than the sum of its proper divisors (1371132).

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

725508 is a wasteful number, since it uses less digits than its factorization.

725508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896 (or 2891 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 725508 is about 851.7675739308. The cubic root of 725508 is about 89.8560662309.

The spelling of 725508 in words is "seven hundred twenty-five thousand, five hundred eight".