520765 has 8 divisors (see below), whose sum is σ = 714240. Its totient is φ = 357072.

The previous prime is 520763. The next prime is 520787. The reversal of 520765 is 567025.

It is a happy number.

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 520765 - 2¹ = 520763 is a prime.

520765 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7405 + ... + 7474.

It is an arithmetic number, because the mean of its divisors is an integer number (89280).

2⁵²⁰⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

520765 is a deficient number, since it is larger than the sum of its proper divisors (193475).

520765 is a wasteful number, since it uses less digits than its factorization.

520765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14891.

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

The square root of 520765 is about 721.6404922120. The cubic root of 520765 is about 80.4539298908.

The spelling of 520765 in words is "five hundred twenty thousand, seven hundred sixty-five".