856875 has 20 divisors (see below), whose sum is σ = 1430792. Its totient is φ = 456000.

The previous prime is 856853. The next prime is 856897. The reversal of 856875 is 578658.

It is a happy number.

856875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (856853) and next prime (856897).

It is not a de Polignac number, because 856875 - 2⁶ = 856811 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

Its product of digits (67200) is a multiple of the sum of its prime factors (480).

856875 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1647 + ... + 2103.

2⁸⁵⁶⁸⁷⁵ is an apocalyptic number.

856875 is a deficient number, since it is larger than the sum of its proper divisors (573917).

856875 is an equidigital number, since it uses as much as digits as its factorization.

856875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 465 counting only the distinct ones).

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

The square root of 856875 is about 925.6754290787. The cubic root of 856875 is about 94.9815291883.

The spelling of 856875 in words is "eight hundred fifty-six thousand, eight hundred seventy-five".