870513625 has 8 divisors (see below), whose sum is σ = 1086401160. Its totient is φ = 696410800.

The previous prime is 870513607. The next prime is 870513643. The reversal of 870513625 is 526315078.

It is an interprime number because it is at equal distance from previous prime (870513607) and next prime (870513643).

It can be written as a sum of positive squares in 4 ways, for example, as 322624 + 870191001 = 568^2 + 29499^2 .

It is not a de Polignac number, because 870513625 - 2⁵ = 870513593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3481930 + ... + 3482179.

It is an arithmetic number, because the mean of its divisors is an integer number (135800145).

Almost surely, 2^870513625 is an apocalyptic number.

It is an amenable number.

870513625 is a deficient number, since it is larger than the sum of its proper divisors (215887535).

870513625 is an equidigital number, since it uses as much as digits as its factorization.

870513625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964124 (or 6964114 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 870513625 is about 29504.4678820005. The cubic root of 870513625 is about 954.8280987708.

The spelling of 870513625 in words is "eight hundred seventy million, five hundred thirteen thousand, six hundred twenty-five".