856315 has 4 divisors (see below), whose sum is σ = 1027584. Its totient is φ = 685048.

The previous prime is 856309. The next prime is 856333. The reversal of 856315 is 513658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 856315 - 2⁷ = 856187 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85627 + ... + 85636.

It is an arithmetic number, because the mean of its divisors is an integer number (256896).

2⁸⁵⁶³¹⁵ is an apocalyptic number.

856315 is a deficient number, since it is larger than the sum of its proper divisors (171269).

856315 is a wasteful number, since it uses less digits than its factorization.

856315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171268.

The product of its digits is 3600, while the sum is 28.

The square root of 856315 is about 925.3728978093. The cubic root of 856315 is about 94.9608333467.

It can be divided in two parts, 85 and 6315, that added together give a square (6400 = 80²).

The spelling of 856315 in words is "eight hundred fifty-six thousand, three hundred fifteen".