871244257 has 16 divisors (see below), whose sum is σ = 948398080. Its totient is φ = 795578112.

The previous prime is 871244233. The next prime is 871244287. The reversal of 871244257 is 752442178.

It is a cyclic number.

It is not a de Polignac number, because 871244257 - 2¹¹ = 871242209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871244287) 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, 862969 + ... + 863977.

It is an arithmetic number, because the mean of its divisors is an integer number (59274880).

Almost surely, 2^871244257 is an apocalyptic number.

It is an amenable number.

871244257 is a deficient number, since it is larger than the sum of its proper divisors (77153823).

871244257 is a wasteful number, since it uses less digits than its factorization.

871244257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its digits is 125440, while the sum is 40.

The square root of 871244257 is about 29516.8470030252. The cubic root of 871244257 is about 955.0951567691.

The spelling of 871244257 in words is "eight hundred seventy-one million, two hundred forty-four thousand, two hundred fifty-seven".