520501 has 4 divisors (see below), whose sum is σ = 527904. Its totient is φ = 513100.

The previous prime is 520451. The next prime is 520529. The reversal of 520501 is 105025.

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 520501 - 2⁹ = 519989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520571) 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, 3595 + ... + 3736.

It is an arithmetic number, because the mean of its divisors is an integer number (131976).

2⁵²⁰⁵⁰¹ is an apocalyptic number.

It is an amenable number.

520501 is a deficient number, since it is larger than the sum of its proper divisors (7403).

520501 is an equidigital number, since it uses as much as digits as its factorization.

520501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7402.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 520501 is about 721.4575524589. The cubic root of 520501 is about 80.4403323131.

Adding to 520501 its reverse (105025), we get a palindrome (625526).

The spelling of 520501 in words is "five hundred twenty thousand, five hundred one".