851207 has 16 divisors (see below), whose sum is σ = 1078272. Its totient is φ = 654720.

The previous prime is 851203. The next prime is 851209. The reversal of 851207 is 702158.

It is a cyclic number.

It is not a de Polignac number, because 851207 - 2² = 851203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 851207.

It is not an unprimeable number, because it can be changed into a prime (851203) 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, 2582 + ... + 2892.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2⁸⁵¹²⁰⁷ is an apocalyptic number.

851207 is a deficient number, since it is larger than the sum of its proper divisors (227065).

851207 is a wasteful number, since it uses less digits than its factorization.

851207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 851207 is about 922.6088011720. The cubic root of 851207 is about 94.7716398755.

It can be divided in two parts, 8 and 51207, that added together give a palindrome (51215).

The spelling of 851207 in words is "eight hundred fifty-one thousand, two hundred seven".