851112 has 24 divisors (see below), whose sum is σ = 2305290. Its totient is φ = 283680.

The previous prime is 851093. The next prime is 851113. The reversal of 851112 is 211158.

It can be written as a sum of positive squares in only one way, i.e., 820836 + 30276 = 906^2 + 174^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (851113) 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 5 ways as a sum of consecutive naturals, for example, 5839 + ... + 5982.

2⁸⁵¹¹¹² is an apocalyptic number.

It is an amenable number.

851112 is an abundant number, since it is smaller than the sum of its proper divisors (1454178).

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

851112 is a wasteful number, since it uses less digits than its factorization.

851112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11833 (or 11826 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 851112 is about 922.5573152927. The cubic root of 851112 is about 94.7681140427.

The spelling of 851112 in words is "eight hundred fifty-one thousand, one hundred twelve".