520887 has 4 divisors (see below), whose sum is σ = 694520. Its totient is φ = 347256.

The previous prime is 520867. The next prime is 520889. The reversal of 520887 is 788025.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 520887 - 2⁷ = 520759 is a prime.

It is a D-number.

It is a Duffinian number.

520887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86812 + ... + 86817.

It is an arithmetic number, because the mean of its divisors is an integer number (173630).

2⁵²⁰⁸⁸⁷ is an apocalyptic number.

520887 is a deficient number, since it is larger than the sum of its proper divisors (173633).

520887 is a wasteful number, since it uses less digits than its factorization.

520887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173632.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 520887 is about 721.7250168866. The cubic root of 520887 is about 80.4602120674.

The spelling of 520887 in words is "five hundred twenty thousand, eight hundred eighty-seven".