856458 has 12 divisors (see below), whose sum is σ = 1855698. Its totient is φ = 285480.

The previous prime is 856441. The next prime is 856459. The reversal of 856458 is 854658.

It is a happy number.

856458 is a `hidden beast` number, since 8 + 5 + 645 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 651249 + 205209 = 807^2 + 453^2 .

It is a Curzon number.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23773 + ... + 23808.

2⁸⁵⁶⁴⁵⁸ is an apocalyptic number.

856458 is an abundant number, since it is smaller than the sum of its proper divisors (999240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856458 is a wasteful number, since it uses less digits than its factorization.

856458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47589 (or 47586 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 856458 is about 925.4501607326. The cubic root of 856458 is about 94.9661190353.

The spelling of 856458 in words is "eight hundred fifty-six thousand, four hundred fifty-eight".