520774421 has 4 divisors (see below), whose sum is σ = 528109344. Its totient is φ = 513439500.

The previous prime is 520774403. The next prime is 520774517. The reversal of 520774421 is 124477025.

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 520774421 - 2¹⁰ = 520773397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520774321) 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, 3667355 + ... + 3667496.

It is an arithmetic number, because the mean of its divisors is an integer number (132027336).

Almost surely, 2^520774421 is an apocalyptic number.

It is an amenable number.

520774421 is a deficient number, since it is larger than the sum of its proper divisors (7334923).

520774421 is an equidigital number, since it uses as much as digits as its factorization.

520774421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334922.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 520774421 is about 22820.4824883261. The cubic root of 520774421 is about 804.5441504369.

The spelling of 520774421 in words is "five hundred twenty million, seven hundred seventy-four thousand, four hundred twenty-one".