851312 has 40 divisors (see below), whose sum is σ = 2059392. Its totient is φ = 331200.

The previous prime is 851303. The next prime is 851321. The reversal of 851312 is 213158.

It is an interprime number because it is at equal distance from previous prime (851303) and next prime (851321).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887 + ... + 1577.

2⁸⁵¹³¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1029696).

851312 is an abundant number, since it is smaller than the sum of its proper divisors (1208080).

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

851312 is a wasteful number, since it uses less digits than its factorization.

851312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 711 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 851312 is about 922.6657032750. The cubic root of 851312 is about 94.7755365435.

The spelling of 851312 in words is "eight hundred fifty-one thousand, three hundred twelve".