872451905 has 32 divisors (see below), whose sum is σ = 1158312960. Its totient is φ = 626895360.

The previous prime is 872451871. The next prime is 872451911. The reversal of 872451905 is 509154278.

It is not a de Polignac number, because 872451905 - 2⁶ = 872451841 is a prime.

It is a super-2 number, since 2×872451905² = 1522344653076258050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363389 + ... + 365781.

It is an arithmetic number, because the mean of its divisors is an integer number (36197280).

Almost surely, 2^872451905 is an apocalyptic number.

It is an amenable number.

872451905 is a deficient number, since it is larger than the sum of its proper divisors (285861055).

872451905 is a wasteful number, since it uses less digits than its factorization.

872451905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 872451905 is about 29537.2968465295. The cubic root of 872451905 is about 955.5362447998.

The spelling of 872451905 in words is "eight hundred seventy-two million, four hundred fifty-one thousand, nine hundred five".