520287 has 4 divisors (see below), whose sum is σ = 693720. Its totient is φ = 346856.

The previous prime is 520279. The next prime is 520291. The reversal of 520287 is 782025.

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

It is a cyclic number.

It is not a de Polignac number, because 520287 - 2³ = 520279 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 520287.

It is not an unprimeable number, because it can be changed into a prime (520297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86712 + ... + 86717.

It is an arithmetic number, because the mean of its divisors is an integer number (173430).

2⁵²⁰²⁸⁷ is an apocalyptic number.

520287 is a deficient number, since it is larger than the sum of its proper divisors (173433).

520287 is a wasteful number, since it uses less digits than its factorization.

520287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173432.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 520287 is about 721.3092263378. The cubic root of 520287 is about 80.4293066597.

The spelling of 520287 in words is "five hundred twenty thousand, two hundred eighty-seven".