520539 has 8 divisors (see below), whose sum is σ = 698880. Its totient is φ = 344616.

The previous prime is 520529. The next prime is 520547. The reversal of 520539 is 935025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520539 - 2⁷ = 520411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520529) 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 7 ways as a sum of consecutive naturals, for example, 19 + ... + 1020.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2⁵²⁰⁵³⁹ is an apocalyptic number.

520539 is a deficient number, since it is larger than the sum of its proper divisors (178341).

520539 is a wasteful number, since it uses less digits than its factorization.

520539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 520539 is about 721.4838875540. The cubic root of 520539 is about 80.4422898234.

The spelling of 520539 in words is "five hundred twenty thousand, five hundred thirty-nine".