520537 has 4 divisors (see below), whose sum is σ = 523216. Its totient is φ = 517860.

The previous prime is 520529. The next prime is 520547. The reversal of 520537 is 735025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520537 - 2³ = 520529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520547) 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, 1023 + ... + 1444.

It is an arithmetic number, because the mean of its divisors is an integer number (130804).

2⁵²⁰⁵³⁷ is an apocalyptic number.

It is an amenable number.

520537 is a deficient number, since it is larger than the sum of its proper divisors (2679).

520537 is a wasteful number, since it uses less digits than its factorization.

520537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 520537 is about 721.4825015203. The cubic root of 520537 is about 80.4421867990.

The spelling of 520537 in words is "five hundred twenty thousand, five hundred thirty-seven".