520928261 has 6 divisors (see below), whose sum is σ = 605977830. Its totient is φ = 446509896.

The previous prime is 520928257. The next prime is 520928267. The reversal of 520928261 is 162829025.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 493950625 + 26977636 = 22225^2 + 5194^2 .

It is not a de Polignac number, because 520928261 - 2² = 520928257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520928267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5315546 + ... + 5315643.

It is an arithmetic number, because the mean of its divisors is an integer number (100996305).

Almost surely, 2^520928261 is an apocalyptic number.

It is an amenable number.

520928261 is a deficient number, since it is larger than the sum of its proper divisors (85049569).

520928261 is a wasteful number, since it uses less digits than its factorization.

520928261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631203 (or 10631196 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 520928261 is about 22823.8528956003. The cubic root of 520928261 is about 804.6233650843.

The spelling of 520928261 in words is "five hundred twenty million, nine hundred twenty-eight thousand, two hundred sixty-one".