685136 has 10 divisors (see below), whose sum is σ = 1327482. Its totient is φ = 342560.

The previous prime is 685123. The next prime is 685141. The reversal of 685136 is 631586.

It can be written as a sum of positive squares in only one way, i.e., 414736 + 270400 = 644^2 + 520^2 .

It is a super-2 number, since 2×685136² = 938822676992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685099 and 685108.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685136.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21395 + ... + 21426.

2⁶⁸⁵¹³⁶ is an apocalyptic number.

It is an amenable number.

685136 is a deficient number, since it is larger than the sum of its proper divisors (642346).

685136 is a wasteful number, since it uses less digits than its factorization.

685136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42829 (or 42823 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 685136 is about 827.7294243894. The cubic root of 685136 is about 88.1574316859.

The spelling of 685136 in words is "six hundred eighty-five thousand, one hundred thirty-six".