870531 has 16 divisors (see below), whose sum is σ = 1214208. Its totient is φ = 554400.

The previous prime is 870517. The next prime is 870533. The reversal of 870531 is 135078.

It is not a de Polignac number, because 870531 - 2⁷ = 870403 is a prime.

It is a super-3 number, since 3×870531³ = 1979128433303793873, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (870533) 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, 12226 + ... + 12296.

It is an arithmetic number, because the mean of its divisors is an integer number (75888).

2⁸⁷⁰⁵³¹ is an apocalyptic number.

870531 is a deficient number, since it is larger than the sum of its proper divisors (343677).

870531 is a wasteful number, since it uses less digits than its factorization.

870531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 870531 is about 933.0225077671. The cubic root of 870531 is about 95.4834451353.

The spelling of 870531 in words is "eight hundred seventy thousand, five hundred thirty-one".