686252 has 12 divisors (see below), whose sum is σ = 1372560. Its totient is φ = 294096.

The previous prime is 686209. The next prime is 686267. The reversal of 686252 is 252686.

686252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

686252 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686252.

It is an unprimeable number.

686252 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12227 + ... + 12282.

It is an arithmetic number, because the mean of its divisors is an integer number (114380).

2⁶⁸⁶²⁵² is an apocalyptic number.

It is an amenable number.

686252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

686252 is a wasteful number, since it uses less digits than its factorization.

686252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24520 (or 24518 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 686252 is about 828.4032834314. The cubic root of 686252 is about 88.2052714938.

The spelling of 686252 in words is "six hundred eighty-six thousand, two hundred fifty-two".