685875 has 32 divisors (see below), whose sum is σ = 1198080. Its totient is φ = 348000.

The previous prime is 685859. The next prime is 685907. The reversal of 685875 is 578586.

It is a happy number.

It is not a de Polignac number, because 685875 - 2⁴ = 685859 is a prime.

It is a nialpdrome in base 7 and base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685875.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11596 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (37440).

2⁶⁸⁵⁸⁷⁵ is an apocalyptic number.

685875 is a deficient number, since it is larger than the sum of its proper divisors (512205).

685875 is a wasteful number, since it uses less digits than its factorization.

685875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 98 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 685875 is about 828.1757059948. The cubic root of 685875 is about 88.1891163601.

The spelling of 685875 in words is "six hundred eighty-five thousand, eight hundred seventy-five".