725556 has 24 divisors (see below), whose sum is σ = 1823584. Its totient is φ = 223200.

The previous prime is 725537. The next prime is 725579. The reversal of 725556 is 655527.

It is a congruent number.

It is an unprimeable number.

725556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2170 + ... + 2481.

2⁷²⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

725556 is an abundant number, since it is smaller than the sum of its proper divisors (1098028).

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

725556 is a wasteful number, since it uses less digits than its factorization.

725556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671 (or 4669 counting only the distinct ones).

The product of its digits is 10500, while the sum is 30.

The square root of 725556 is about 851.7957501655. The cubic root of 725556 is about 89.8580478291.

The spelling of 725556 in words is "seven hundred twenty-five thousand, five hundred fifty-six".