855992 has 16 divisors (see below), whose sum is σ = 1629960. Its totient is φ = 421344.

The previous prime is 855989. The next prime is 855997. The reversal of 855992 is 299558.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263 + ... + 1334.

2⁸⁵⁵⁹⁹² is an apocalyptic number.

It is an amenable number.

855992 is a deficient number, since it is larger than the sum of its proper divisors (773968).

855992 is a wasteful number, since it uses less digits than its factorization.

855992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670 (or 1666 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 855992 is about 925.1983571105. The cubic root of 855992 is about 94.9488921777.

The spelling of 855992 in words is "eight hundred fifty-five thousand, nine hundred ninety-two".