520415425 has 6 divisors (see below), whose sum is σ = 645315158. Its totient is φ = 416332320.

The previous prime is 520415417. The next prime is 520415513. The reversal of 520415425 is 524514025.

It can be written as a sum of positive squares in 3 ways, for example, as 6395841 + 514019584 = 2529^2 + 22672^2 .

It is not a de Polignac number, because 520415425 - 2³ = 520415417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520415393 and 520415402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10408284 + ... + 10408333.

Almost surely, 2^520415425 is an apocalyptic number.

It is an amenable number.

520415425 is a deficient number, since it is larger than the sum of its proper divisors (124899733).

520415425 is a wasteful number, since it uses less digits than its factorization.

520415425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20816627 (or 20816622 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 520415425 is about 22812.6154791598. The cubic root of 520415425 is about 804.3592370249.

The spelling of 520415425 in words is "five hundred twenty million, four hundred fifteen thousand, four hundred twenty-five".