685575 has 36 divisors (see below), whose sum is σ = 1344408. Its totient is φ = 331200.

The previous prime is 685547. The next prime is 685591. The reversal of 685575 is 575586.

685575 is a `hidden beast` number, since 6 + 85 + 575 = 666.

685575 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685575 - 2⁶ = 685511 is a prime.

685575 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2337 + ... + 2613.

2⁶⁸⁵⁵⁷⁵ is an apocalyptic number.

685575 is a deficient number, since it is larger than the sum of its proper divisors (658833).

685575 is a wasteful number, since it uses less digits than its factorization.

685575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 296 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 685575 is about 827.9945651996. The cubic root of 685575 is about 88.1762565857.

The spelling of 685575 in words is "six hundred eighty-five thousand, five hundred seventy-five".