520530545 has 8 divisors (see below), whose sum is σ = 630165096. Its totient is φ = 412738816.

The previous prime is 520530533. The next prime is 520530553. The reversal of 520530545 is 545035025.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 57032704 + 463497841 = 7552^2 + 21529^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 520530545 - 2⁴ = 520530529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460082 + ... + 461211.

It is an arithmetic number, because the mean of its divisors is an integer number (78770637).

Almost surely, 2^520530545 is an apocalyptic number.

It is an amenable number.

520530545 is a deficient number, since it is larger than the sum of its proper divisors (109634551).

520530545 is a wasteful number, since it uses less digits than its factorization.

520530545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921411.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 520530545 is about 22815.1385049489. The cubic root of 520530545 is about 804.4185428563.

The spelling of 520530545 in words is "five hundred twenty million, five hundred thirty thousand, five hundred forty-five".