856285 has 8 divisors (see below), whose sum is σ = 1052856. Its totient is φ = 668160.

The previous prime is 856279. The next prime is 856301. The reversal of 856285 is 582658.

856285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 71289 + 784996 = 267^2 + 886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 856285 - 2³ = 856277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 856285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1884 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (131607).

2⁸⁵⁶²⁸⁵ is an apocalyptic number.

It is an amenable number.

856285 is a deficient number, since it is larger than the sum of its proper divisors (196571).

856285 is a wasteful number, since it uses less digits than its factorization.

856285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223.

The product of its digits is 19200, while the sum is 34.

The square root of 856285 is about 925.3566879858. The cubic root of 856285 is about 94.9597243863.

The spelling of 856285 in words is "eight hundred fifty-six thousand, two hundred eighty-five".