856854 has 24 divisors (see below), whose sum is σ = 1873872. Its totient is φ = 282960.

The previous prime is 856853. The next prime is 856897. The reversal of 856854 is 458658.

It is a happy number.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 3127 + ... + 3389.

It is an arithmetic number, because the mean of its divisors is an integer number (78078).

2⁸⁵⁶⁸⁵⁴ is an apocalyptic number.

856854 is an abundant number, since it is smaller than the sum of its proper divisors (1017018).

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

856854 is a wasteful number, since it uses less digits than its factorization.

856854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 449 counting only the distinct ones).

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

The square root of 856854 is about 925.6640859405. The cubic root of 856854 is about 94.9807532570.

The spelling of 856854 in words is "eight hundred fifty-six thousand, eight hundred fifty-four".