725490 has 32 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 193392.

The previous prime is 725479. The next prime is 725507. The reversal of 725490 is 94527.

725490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725490.

It is an unprimeable number.

725490 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 15 ways as a sum of consecutive naturals, for example, 1074 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁷²⁵⁴⁹⁰ is an apocalyptic number.

725490 is an abundant number, since it is smaller than the sum of its proper divisors (1209870).

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

725490 is a wasteful number, since it uses less digits than its factorization.

725490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 725490 is about 851.7570076025. The cubic root of 725490 is about 89.8553231090.

The spelling of 725490 in words is "seven hundred twenty-five thousand, four hundred ninety".