520706761 has 9 divisors (see below), whose sum is σ = 550012743. Its totient is φ = 492890400.

The previous prime is 520706759. The next prime is 520706789. The reversal of 520706761 is 167607025.

The square root of 520706761 is 22819.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 866761 + 519840000 = 931^2 + 22800^2 .

It is not a de Polignac number, because 520706761 - 2¹ = 520706759 is a prime.

It is a super-2 number, since 2×520706761² = 542271061902222242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520706741) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 432961 + ... + 434161.

It is an arithmetic number, because the mean of its divisors is an integer number (61112527).

Almost surely, 2^520706761 is an apocalyptic number.

520706761 is the 22819-th square number.

520706761 is the 11410-th centered octagonal number.

It is an amenable number.

520706761 is a deficient number, since it is larger than the sum of its proper divisors (29305982).

520706761 is an frugal number, since it uses more digits than its factorization.

520706761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The cubic root of 520706761 is about 804.5093062941.

It can be divided in two parts, 520 and 706761, that added together give a 4-th power (707281 = 29⁴).

The spelling of 520706761 in words is "five hundred twenty million, seven hundred six thousand, seven hundred sixty-one".