856855 has 8 divisors (see below), whose sum is σ = 1033200. Its totient is φ = 682176.

The previous prime is 856853. The next prime is 856897. The reversal of 856855 is 558658.

It is a happy number.

856855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 856855 - 2¹ = 856853 is a prime.

856855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856853) 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, 1836 + ... + 2254.

It is an arithmetic number, because the mean of its divisors is an integer number (129150).

2⁸⁵⁶⁸⁵⁵ is an apocalyptic number.

856855 is a deficient number, since it is larger than the sum of its proper divisors (176345).

856855 is a wasteful number, since it uses less digits than its factorization.

856855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833.

The product of its digits is 48000, while the sum is 37.

The square root of 856855 is about 925.6646260931. The cubic root of 856855 is about 94.9807902064.

It can be divided in two parts, 856 and 855, that added together give a triangular number (1711 = T₅₈).

The spelling of 856855 in words is "eight hundred fifty-six thousand, eight hundred fifty-five".