520045001 has 4 divisors (see below), whose sum is σ = 594337152. Its totient is φ = 445752852.

The previous prime is 520044971. The next prime is 520045021. The reversal of 520045001 is 100540025.

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 520045001 - 2¹⁰ = 520043977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520045021) 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, 37146065 + ... + 37146078.

It is an arithmetic number, because the mean of its divisors is an integer number (148584288).

Almost surely, 2^520045001 is an apocalyptic number.

It is an amenable number.

520045001 is a deficient number, since it is larger than the sum of its proper divisors (74292151).

520045001 is an equidigital number, since it uses as much as digits as its factorization.

520045001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74292150.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 520045001 is about 22804.4951928342. The cubic root of 520045001 is about 804.1683480589.

Adding to 520045001 its reverse (100540025), we get a palindrome (620585026).

The spelling of 520045001 in words is "five hundred twenty million, forty-five thousand, one".