851956 has 12 divisors (see below), whose sum is σ = 1703968. Its totient is φ = 365112.

The previous prime is 851953. The next prime is 851957. The reversal of 851956 is 659158.

851956 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15186 + ... + 15241.

2⁸⁵¹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

851956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851956 is a wasteful number, since it uses less digits than its factorization.

851956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30438 (or 30436 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 851956 is about 923.0146261030. The cubic root of 851956 is about 94.7994291004.

The spelling of 851956 in words is "eight hundred fifty-one thousand, nine hundred fifty-six".