685497124 has 81 divisors (see below), whose sum is σ = 1397318643. Its totient is φ = 294076224.

The previous prime is 685497107. The next prime is 685497161. The reversal of 685497124 is 421794586.

The square root of 685497124 is 26182.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 17791524 + 667705600 = 4218^2 + 25840^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12933882 + ... + 12933934.

Almost surely, 2^685497124 is an apocalyptic number.

685497124 is the 26182-nd square number.

It is an amenable number.

685497124 is an abundant number, since it is smaller than the sum of its proper divisors (711821519).

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

685497124 is a wasteful number, since it uses less digits than its factorization.

685497124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 87 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The cubic root of 685497124 is about 881.7291774644.

The spelling of 685497124 in words is "six hundred eighty-five million, four hundred ninety-seven thousand, one hundred twenty-four".