856995 has 32 divisors (see below), whose sum is σ = 1505280. Its totient is φ = 414720.

The previous prime is 856993. The next prime is 857009. The reversal of 856995 is 599658.

856995 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 856995 - 2¹ = 856993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8787 + ... + 8883.

It is an arithmetic number, because the mean of its divisors is an integer number (47040).

2⁸⁵⁶⁹⁹⁵ is an apocalyptic number.

856995 is a deficient number, since it is larger than the sum of its proper divisors (648285).

856995 is a wasteful number, since it uses less digits than its factorization.

856995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155.

The product of its digits is 97200, while the sum is 42.

The square root of 856995 is about 925.7402443450. The cubic root of 856995 is about 94.9859628383.

The spelling of 856995 in words is "eight hundred fifty-six thousand, nine hundred ninety-five".