851256 has 64 divisors (see below), whose sum is σ = 2707200. Its totient is φ = 242784.

The previous prime is 851251. The next prime is 851261. The reversal of 851256 is 652158.

It is an interprime number because it is at equal distance from previous prime (851251) and next prime (851261).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 851256.

It is not an unprimeable number, because it can be changed into a prime (851251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1231 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (42300).

2⁸⁵¹²⁵⁶ 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 851256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353600).

851256 is an abundant number, since it is smaller than the sum of its proper divisors (1855944).

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

851256 is a wasteful number, since it uses less digits than its factorization.

851256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 575 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 851256 is about 922.6353559235. The cubic root of 851256 is about 94.7734583604.

The spelling of 851256 in words is "eight hundred fifty-one thousand, two hundred fifty-six".