872531 has 6 divisors (see below), whose sum is σ = 959196. Its totient is φ = 793100.

The previous prime is 872479. The next prime is 872533. The reversal of 872531 is 135278.

It is not a de Polignac number, because 872531 - 2¹⁴ = 856147 is a prime.

It is a super-2 number, since 2×872531² = 1522620691922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 872531.

It is not an unprimeable number, because it can be changed into a prime (872533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3485 + ... + 3726.

It is an arithmetic number, because the mean of its divisors is an integer number (159866).

2⁸⁷²⁵³¹ is an apocalyptic number.

872531 is a deficient number, since it is larger than the sum of its proper divisors (86665).

872531 is a wasteful number, since it uses less digits than its factorization.

872531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7233 (or 7222 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 872531 is about 934.0936783856. The cubic root of 872531 is about 95.5565119689.

The spelling of 872531 in words is "eight hundred seventy-two thousand, five hundred thirty-one".