685256 has 32 divisors (see below), whose sum is σ = 1512000. Its totient is φ = 287040.

The previous prime is 685249. The next prime is 685271. The reversal of 685256 is 652586.

It is a happy number.

685256 is nontrivially palindromic in base 7.

It is an unprimeable number.

685256 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 7 ways as a sum of consecutive naturals, for example, 845 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2⁶⁸⁵²⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756000).

685256 is an abundant number, since it is smaller than the sum of its proper divisors (826744).

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

685256 is a wasteful number, since it uses less digits than its factorization.

685256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 625 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 685256 is about 827.8019086714. The cubic root of 685256 is about 88.1625782429.

The spelling of 685256 in words is "six hundred eighty-five thousand, two hundred fifty-six".