871525921 has 8 divisors (see below), whose sum is σ = 996222080. Its totient is φ = 746877888.

The previous prime is 871525817. The next prime is 871525939. The reversal of 871525921 is 129525178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 871525921 - 2⁷ = 871525793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (871520921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44500 + ... + 61018.

It is an arithmetic number, because the mean of its divisors is an integer number (124527760).

Almost surely, 2^871525921 is an apocalyptic number.

It is an amenable number.

871525921 is a deficient number, since it is larger than the sum of its proper divisors (124696159).

871525921 is a wasteful number, since it uses less digits than its factorization.

871525921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24063.

The product of its digits is 50400, while the sum is 40.

The square root of 871525921 is about 29521.6178587827. The cubic root of 871525921 is about 955.1980697143.

The spelling of 871525921 in words is "eight hundred seventy-one million, five hundred twenty-five thousand, nine hundred twenty-one".