520434521 has 4 divisors (see below), whose sum is σ = 520728192. Its totient is φ = 520140852.

The previous prime is 520434469. The next prime is 520434527. The reversal of 520434521 is 125434025.

It is a happy number.

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 520434521 - 2²² = 516240217 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 (520434527) 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, 144161 + ... + 147726.

It is an arithmetic number, because the mean of its divisors is an integer number (130182048).

Almost surely, 2^520434521 is an apocalyptic number.

It is an amenable number.

520434521 is a deficient number, since it is larger than the sum of its proper divisors (293671).

520434521 is a wasteful number, since it uses less digits than its factorization.

520434521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293670.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 520434521 is about 22813.0340156674. The cubic root of 520434521 is about 804.3690752268.

Adding to 520434521 its reverse (125434025), we get a palindrome (645868546).

The spelling of 520434521 in words is "five hundred twenty million, four hundred thirty-four thousand, five hundred twenty-one".