520041421 has 2 divisors, whose sum is σ = 520041422. Its totient is φ = 520041420.

The previous prime is 520041391. The next prime is 520041463. The reversal of 520041421 is 124140025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 478296900 + 41744521 = 21870^2 + 6461^2 .

It is a cyclic number.

It is not a de Polignac number, because 520041421 - 2¹⁵ = 520008653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520041491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260020710 + 260020711.

It is an arithmetic number, because the mean of its divisors is an integer number (260020711).

Almost surely, 2^520041421 is an apocalyptic number.

It is an amenable number.

520041421 is a deficient number, since it is larger than the sum of its proper divisors (1).

520041421 is an equidigital number, since it uses as much as digits as its factorization.

520041421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 520041421 is about 22804.4166994028. The cubic root of 520041421 is about 804.1665027511.

Adding to 520041421 its reverse (124140025), we get a palindrome (644181446).

The spelling of 520041421 in words is "five hundred twenty million, forty-one thousand, four hundred twenty-one".