520901 has 4 divisors (see below), whose sum is σ = 532032. Its totient is φ = 509772.

The previous prime is 520889. The next prime is 520913. The reversal of 520901 is 109025.

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 an interprime number because it is at equal distance from previous prime (520889) and next prime (520913).

It is a cyclic number.

It is not a de Polignac number, because 520901 - 2⁶ = 520837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520921) 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, 5495 + ... + 5588.

It is an arithmetic number, because the mean of its divisors is an integer number (133008).

2⁵²⁰⁹⁰¹ is an apocalyptic number.

It is an amenable number.

520901 is a deficient number, since it is larger than the sum of its proper divisors (11131).

520901 is a wasteful number, since it uses less digits than its factorization.

520901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11130.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 520901 is about 721.7347158063. The cubic root of 520901 is about 80.4609329102.

Adding to 520901 its reverse (109025), we get a palindrome (629926).

The spelling of 520901 in words is "five hundred twenty thousand, nine hundred one".