851144 has 16 divisors (see below), whose sum is σ = 1824000. Its totient is φ = 364752.

The previous prime is 851131. The next prime is 851153. The reversal of 851144 is 441158.

It is a super-2 number, since 2×851144² = 1448892217472, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851144.

It is an unprimeable number.

851144 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 7544 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (114000).

2⁸⁵¹¹⁴⁴ is an apocalyptic number.

It is an amenable number.

851144 is an abundant number, since it is smaller than the sum of its proper divisors (972856).

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

851144 is a wasteful number, since it uses less digits than its factorization.

851144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15212 (or 15208 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 851144 is about 922.5746582256. The cubic root of 851144 is about 94.7693017210.

The spelling of 851144 in words is "eight hundred fifty-one thousand, one hundred forty-four".