520425321 has 8 divisors (see below), whose sum is σ = 747277440. Its totient is φ = 320261712.

The previous prime is 520425317. The next prime is 520425331. The reversal of 520425321 is 123524025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520425321 - 2² = 520425317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520425291 and 520425300.

It is not an unprimeable number, because it can be changed into a prime (520425331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6672081 + ... + 6672158.

It is an arithmetic number, because the mean of its divisors is an integer number (93409680).

Almost surely, 2^520425321 is an apocalyptic number.

It is an amenable number.

520425321 is a deficient number, since it is larger than the sum of its proper divisors (226852119).

520425321 is a wasteful number, since it uses less digits than its factorization.

520425321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13344255.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 520425321 is about 22812.8323756609. The cubic root of 520425321 is about 804.3643354445.

Adding to 520425321 its reverse (123524025), we get a palindrome (643949346).

The spelling of 520425321 in words is "five hundred twenty million, four hundred twenty-five thousand, three hundred twenty-one".