520751 has 8 divisors (see below), whose sum is σ = 649344. Its totient is φ = 405720.

The previous prime is 520747. The next prime is 520759. The reversal of 520751 is 157025.

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

It is not a de Polignac number, because 520751 - 2² = 520747 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 (520759) 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, 3305 + ... + 3458.

It is an arithmetic number, because the mean of its divisors is an integer number (81168).

2⁵²⁰⁷⁵¹ is an apocalyptic number.

520751 is a deficient number, since it is larger than the sum of its proper divisors (128593).

520751 is a wasteful number, since it uses less digits than its factorization.

520751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 520751 is about 721.6307920260. The cubic root of 520751 is about 80.4532089226.

Adding to 520751 its reverse (157025), we get a palindrome (677776).

The spelling of 520751 in words is "five hundred twenty thousand, seven hundred fifty-one".