520071 has 4 divisors (see below), whose sum is σ = 693432. Its totient is φ = 346712.

The previous prime is 520067. The next prime is 520073. The reversal of 520071 is 170025.

It is a happy number.

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 520071 - 2² = 520067 is a prime.

It is a D-number.

520071 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 520071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86676 + ... + 86681.

It is an arithmetic number, because the mean of its divisors is an integer number (173358).

2⁵²⁰⁰⁷¹ is an apocalyptic number.

520071 is a deficient number, since it is larger than the sum of its proper divisors (173361).

520071 is a wasteful number, since it uses less digits than its factorization.

520071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173360.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 520071 is about 721.1594830549. The cubic root of 520071 is about 80.4181748966.

Adding to 520071 its reverse (170025), we get a palindrome (690096).

The spelling of 520071 in words is "five hundred twenty thousand, seventy-one".