520756 has 12 divisors (see below), whose sum is σ = 921060. Its totient is φ = 257600.

The previous prime is 520747. The next prime is 520759. The reversal of 520756 is 657025.

It is a happy number.

520756 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 467856 + 52900 = 684^2 + 230^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 520756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520759) by changing a digit.

520756 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241 + ... + 1048.

It is an arithmetic number, because the mean of its divisors is an integer number (76755).

2⁵²⁰⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

520756 is a deficient number, since it is larger than the sum of its proper divisors (400304).

520756 is a wasteful number, since it uses less digits than its factorization.

520756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1392 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 520756 is about 721.6342563931. The cubic root of 520756 is about 80.4534664127.

The spelling of 520756 in words is "five hundred twenty thousand, seven hundred fifty-six".