685457 has 8 divisors (see below), whose sum is σ = 738792. Its totient is φ = 633600.

The previous prime is 685453. The next prime is 685459. The reversal of 685457 is 754586.

685457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 101761 + 583696 = 319^2 + 764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685457 - 2² = 685453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707 + ... + 1367.

It is an arithmetic number, because the mean of its divisors is an integer number (92349).

2⁶⁸⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

685457 is a deficient number, since it is larger than the sum of its proper divisors (53335).

685457 is a wasteful number, since it uses less digits than its factorization.

685457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739.

The product of its digits is 33600, while the sum is 35.

The square root of 685457 is about 827.9233056268. The cubic root of 685457 is about 88.1711973798.

The spelling of 685457 in words is "six hundred eighty-five thousand, four hundred fifty-seven".