856725 has 12 divisors (see below), whose sum is σ = 1416576. Its totient is φ = 456880.

The previous prime is 856721. The next prime is 856733. The reversal of 856725 is 527658.

It is a happy number.

It is not a de Polignac number, because 856725 - 2² = 856721 is a prime.

It is a d-powerful number, because it can be written as 8³ + 5⁴ + 7⁷ + 6² + 2¹⁴ + 5⁶ .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856721) 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, 5637 + ... + 5786.

It is an arithmetic number, because the mean of its divisors is an integer number (118048).

2⁸⁵⁶⁷²⁵ is an apocalyptic number.

It is an amenable number.

856725 is a deficient number, since it is larger than the sum of its proper divisors (559851).

856725 is a wasteful number, since it uses less digits than its factorization.

856725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436 (or 11431 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 856725 is about 925.5944036132. The cubic root of 856725 is about 94.9759865437.

The spelling of 856725 in words is "eight hundred fifty-six thousand, seven hundred twenty-five".