520612705 has 24 divisors (see below), whose sum is σ = 657959400. Its totient is φ = 395408640.

The previous prime is 520612679. The next prime is 520612717. The reversal of 520612705 is 507216025.

520612705 = 103² + 104² + ... + 1160².

It can be written as a sum of positive squares in 4 ways, for example, as 64064016 + 456548689 = 8004^2 + 21367^2 .

It is not a de Polignac number, because 520612705 - 2⁷ = 520612577 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393445 + ... + 394765.

It is an arithmetic number, because the mean of its divisors is an integer number (27414975).

Almost surely, 2^520612705 is an apocalyptic number.

It is an amenable number.

520612705 is a deficient number, since it is larger than the sum of its proper divisors (137346695).

520612705 is a wasteful number, since it uses less digits than its factorization.

520612705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 520612705 is about 22816.9389927746. The cubic root of 520612705 is about 804.4608634919.

The spelling of 520612705 in words is "five hundred twenty million, six hundred twelve thousand, seven hundred five".