725522 has 16 divisors (see below), whose sum is σ = 1287360. Its totient is φ = 300048.

The previous prime is 725519. The next prime is 725531. The reversal of 725522 is 225527.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488 + ... + 1299.

It is an arithmetic number, because the mean of its divisors is an integer number (80460).

2⁷²⁵⁵²² is an apocalyptic number.

725522 is a deficient number, since it is larger than the sum of its proper divisors (561838).

725522 is a wasteful number, since it uses less digits than its factorization.

725522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its digits is 1400, while the sum is 23.

The square root of 725522 is about 851.7757920955. The cubic root of 725522 is about 89.8566442061.

The spelling of 725522 in words is "seven hundred twenty-five thousand, five hundred twenty-two".