856525 has 6 divisors (see below), whose sum is σ = 1062122. Its totient is φ = 685200.

The previous prime is 856519. The next prime is 856529. The reversal of 856525 is 525658.

856525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 281961 + 574564 = 531^2 + 758^2 .

It is a de Polignac number, because none of the positive numbers 2^k-856525 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856529) 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, 17106 + ... + 17155.

2⁸⁵⁶⁵²⁵ is an apocalyptic number.

It is an amenable number.

856525 is a deficient number, since it is larger than the sum of its proper divisors (205597).

856525 is a wasteful number, since it uses less digits than its factorization.

856525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34271 (or 34266 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 856525 is about 925.4863586245. The cubic root of 856525 is about 94.9685953444.

The spelling of 856525 in words is "eight hundred fifty-six thousand, five hundred twenty-five".