520017121 has 16 divisors (see below), whose sum is σ = 570931200. Its totient is φ = 470752128.

The previous prime is 520017059. The next prime is 520017133. The reversal of 520017121 is 121710025.

It is a cyclic number.

It is not a de Polignac number, because 520017121 - 2²⁵ = 486462689 is a prime.

It is a super-2 number, since 2×520017121² = 540835612266257282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520017221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145170 + ... + 148708.

It is an arithmetic number, because the mean of its divisors is an integer number (35683200).

Almost surely, 2^520017121 is an apocalyptic number.

It is an amenable number.

520017121 is a deficient number, since it is larger than the sum of its proper divisors (50914079).

520017121 is a wasteful number, since it uses less digits than its factorization.

520017121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 520017121 is about 22803.8839016515. The cubic root of 520017121 is about 804.1539771140.

Adding to 520017121 its reverse (121710025), we get a palindrome (641727146).

The spelling of 520017121 in words is "five hundred twenty million, seventeen thousand, one hundred twenty-one".