685572 has 12 divisors (see below), whose sum is σ = 1599696. Its totient is φ = 228520.

The previous prime is 685547. The next prime is 685591. The reversal of 685572 is 275586.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28554 + ... + 28577.

It is an arithmetic number, because the mean of its divisors is an integer number (133308).

2⁶⁸⁵⁵⁷² is an apocalyptic number.

It is an amenable number.

685572 is an abundant number, since it is smaller than the sum of its proper divisors (914124).

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

685572 is a wasteful number, since it uses less digits than its factorization.

685572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57138 (or 57136 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 685572 is about 827.9927535915. The cubic root of 685572 is about 88.1761279690.

The spelling of 685572 in words is "six hundred eighty-five thousand, five hundred seventy-two".