685204 has 12 divisors (see below), whose sum is σ = 1291444. Its totient is φ = 316224.

The previous prime is 685199. The next prime is 685231. The reversal of 685204 is 402586.

It can be written as a sum of positive squares in 2 ways, for example, as 260100 + 425104 = 510^2 + 652^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 6537 + ... + 6640.

2⁶⁸⁵²⁰⁴ is an apocalyptic number.

It is an amenable number.

685204 is a deficient number, since it is larger than the sum of its proper divisors (606240).

685204 is a wasteful number, since it uses less digits than its factorization.

685204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13194 (or 13192 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 685204 is about 827.7704995951. The cubic root of 685204 is about 88.1603481420.

The spelling of 685204 in words is "six hundred eighty-five thousand, two hundred four".