856994 has 12 divisors (see below), whose sum is σ = 1325394. Its totient is φ = 415584.

The previous prime is 856993. The next prime is 857009. The reversal of 856994 is 499658.

It can be written as a sum of positive squares in 3 ways, for example, as 786769 + 70225 = 887^2 + 265^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (856993) 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, 2582 + ... + 2894.

2⁸⁵⁶⁹⁹⁴ is an apocalyptic number.

856994 is a deficient number, since it is larger than the sum of its proper divisors (468400).

856994 is a wasteful number, since it uses less digits than its factorization.

856994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 352 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 856994 is about 925.7397042366. The cubic root of 856994 is about 94.9859258929.

The spelling of 856994 in words is "eight hundred fifty-six thousand, nine hundred ninety-four".