861372275 has 12 divisors (see below), whose sum is σ = 1069863072. Its totient is φ = 687961440.

The previous prime is 861372229. The next prime is 861372283. The reversal of 861372275 is 572273168.

It is not a de Polignac number, because 861372275 - 2²⁶ = 794263411 is a prime.

It is a super-2 number, since 2×861372275² = 1483924392277351250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12779 + ... + 43428.

It is an arithmetic number, because the mean of its divisors is an integer number (89155256).

Almost surely, 2^861372275 is an apocalyptic number.

861372275 is a deficient number, since it is larger than the sum of its proper divisors (208490797).

861372275 is a wasteful number, since it uses less digits than its factorization.

861372275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56830 (or 56825 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 861372275 is about 29349.1443657221. The cubic root of 861372275 is about 951.4740827240.

The spelling of 861372275 in words is "eight hundred sixty-one million, three hundred seventy-two thousand, two hundred seventy-five".