870545025 has 81 divisors (see below), whose sum is σ = 1820290953. Its totient is φ = 396547200.

The previous prime is 870545023. The next prime is 870545029. The reversal of 870545025 is 520545078.

It is a happy number.

The square root of 870545025 is 29505.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1238769 + 869306256 = 1113^2 + 29484^2 .

It is not a de Polignac number, because 870545025 - 2¹ = 870545023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (870545023) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 3097885 + ... + 3098165.

Almost surely, 2^870545025 is an apocalyptic number.

870545025 is the 29505-th square number.

870545025 is the 14753-rd centered octagonal number.

It is an amenable number.

870545025 is an abundant number, since it is smaller than the sum of its proper divisors (949745928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

870545025 is a wasteful number, since it uses less digits than its factorization.

870545025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The cubic root of 870545025 is about 954.8395790589.

Multiplying 870545025 by its sum of digits (36), we get a square (31339620900 = 177030²).

The spelling of 870545025 in words is "eight hundred seventy million, five hundred forty-five thousand, twenty-five".