856970 has 24 divisors (see below), whose sum is σ = 1656612. Its totient is φ = 318080.

The previous prime is 856969. The next prime is 856993. The reversal of 856970 is 79658.

It can be written as a sum of positive squares in 2 ways, for example, as 851929 + 5041 = 923^2 + 71^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 856970.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12035 + ... + 12105.

2⁸⁵⁶⁹⁷⁰ is an apocalyptic number.

856970 is a deficient number, since it is larger than the sum of its proper divisors (799642).

856970 is a wasteful number, since it uses less digits than its factorization.

856970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 856970 is about 925.7267415388. The cubic root of 856970 is about 94.9850391953.

The spelling of 856970 in words is "eight hundred fifty-six thousand, nine hundred seventy".