520001 has 4 divisors (see below), whose sum is σ = 521904. Its totient is φ = 518100.

The previous prime is 519997. The next prime is 520019. The reversal of 520001 is 100025.

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 520001 - 2² = 519997 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 520001.

It is not an unprimeable number, because it can be changed into a prime (520021) 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, 455 + ... + 1116.

It is an arithmetic number, because the mean of its divisors is an integer number (130476).

2⁵²⁰⁰⁰¹ is an apocalyptic number.

It is an amenable number.

520001 is a deficient number, since it is larger than the sum of its proper divisors (1903).

520001 is a wasteful number, since it uses less digits than its factorization.

520001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 520001 is about 721.1109484677. The cubic root of 520001 is about 80.4145667195.

Adding to 520001 its reverse (100025), we get a palindrome (620026).

The spelling of 520001 in words is "five hundred twenty thousand, one".