520711 has 4 divisors (see below), whose sum is σ = 523800. Its totient is φ = 517624.

The previous prime is 520703. The next prime is 520717. The reversal of 520711 is 117025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520711 - 2³ = 520703 is a prime.

It is a super-2 number, since 2×520711² = 542279891042, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 520711 parts by 1020 straight cuts.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520717) by changing a digit.

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, 1276 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (130950).

2⁵²⁰⁷¹¹ is an apocalyptic number.

520711 is a deficient number, since it is larger than the sum of its proper divisors (3089).

520711 is a wasteful number, since it uses less digits than its factorization.

520711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 520711 is about 721.6030764901. The cubic root of 520711 is about 80.4511489420.

Adding to 520711 its reverse (117025), we get a palindrome (637736).

The spelling of 520711 in words is "five hundred twenty thousand, seven hundred eleven".