515871 has 18 divisors (see below), whose sum is σ = 787488. Its totient is φ = 325080.

The previous prime is 515861. The next prime is 515873. The reversal of 515871 is 178515.

It is not a de Polignac number, because 515871 - 2⁵ = 515839 is a prime.

It is a super-2 number, since 2×515871² = 532245777282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515873) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11976 + ... + 12018.

2⁵¹⁵⁸⁷¹ is an apocalyptic number.

515871 is a deficient number, since it is larger than the sum of its proper divisors (271617).

515871 is a wasteful number, since it uses less digits than its factorization.

515871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 77 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 515871 is about 718.2416028051. The cubic root of 515871 is about 80.2011086013.

It can be divided in two parts, 5 and 15871, that added together give a square (15876 = 126²).

The spelling of 515871 in words is "five hundred fifteen thousand, eight hundred seventy-one".