871217825 has 12 divisors (see below), whose sum is σ = 1081024560. Its totient is φ = 696513360.

The previous prime is 871217761. The next prime is 871217833. The reversal of 871217825 is 528712178.

It is not a de Polignac number, because 871217825 - 2⁶ = 871217761 is a prime.

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, 29966 + ... + 51384.

It is an arithmetic number, because the mean of its divisors is an integer number (90085380).

Almost surely, 2^871217825 is an apocalyptic number.

It is an amenable number.

871217825 is a deficient number, since it is larger than the sum of its proper divisors (209806735).

871217825 is a wasteful number, since it uses less digits than its factorization.

871217825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23056 (or 23051 counting only the distinct ones).

The product of its digits is 62720, while the sum is 41.

The square root of 871217825 is about 29516.3992553292. The cubic root of 871217825 is about 955.0854980424.

The spelling of 871217825 in words is "eight hundred seventy-one million, two hundred seventeen thousand, eight hundred twenty-five".