856456 has 8 divisors (see below), whose sum is σ = 1605870. Its totient is φ = 428224.

The previous prime is 856441. The next prime is 856459. The reversal of 856456 is 654658.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 133956 = 850^2 + 366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (856459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53521 + ... + 53536.

2⁸⁵⁶⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

856456 is a deficient number, since it is larger than the sum of its proper divisors (749414).

856456 is a wasteful number, since it uses less digits than its factorization.

856456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107063 (or 107059 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 856456 is about 925.4490801768. The cubic root of 856456 is about 94.9660451137.

The spelling of 856456 in words is "eight hundred fifty-six thousand, four hundred fifty-six".