851992 has 16 divisors (see below), whose sum is σ = 1607400. Its totient is φ = 423360.

The previous prime is 851971. The next prime is 852011. The reversal of 851992 is 299158.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059 + ... + 2437.

2⁸⁵¹⁹⁹² is an apocalyptic number.

It is an amenable number.

851992 is a deficient number, since it is larger than the sum of its proper divisors (755408).

851992 is a wasteful number, since it uses less digits than its factorization.

851992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 662 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 851992 is about 923.0341272131. The cubic root of 851992 is about 94.8007643538.

The spelling of 851992 in words is "eight hundred fifty-one thousand, nine hundred ninety-two".