851255 has 8 divisors (see below), whose sum is σ = 1038624. Its totient is φ = 669600.

The previous prime is 851251. The next prime is 851261. The reversal of 851255 is 552158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 851255 - 2² = 851251 is a prime.

It is an Ulam number.

It is a Duffinian number.

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 851255.

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 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 1700.

It is an arithmetic number, because the mean of its divisors is an integer number (129828).

2⁸⁵¹²⁵⁵ is an apocalyptic number.

851255 is a deficient number, since it is larger than the sum of its proper divisors (187369).

851255 is a wasteful number, since it uses less digits than its factorization.

851255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857.

The product of its digits is 2000, while the sum is 26.

The square root of 851255 is about 922.6348139974. The cubic root of 851255 is about 94.7734212492.

The spelling of 851255 in words is "eight hundred fifty-one thousand, two hundred fifty-five".