520171 has 4 divisors (see below), whose sum is σ = 532312. Its totient is φ = 508032.

The previous prime is 520151. The next prime is 520193. The reversal of 520171 is 171025.

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

It is a 7-Lehmer number, since φ(520171) divides (520171-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 520171 - 2⁷ = 520043 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520111) 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, 6006 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (133078).

2⁵²⁰¹⁷¹ is an apocalyptic number.

520171 is a deficient number, since it is larger than the sum of its proper divisors (12141).

520171 is a wasteful number, since it uses less digits than its factorization.

520171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12140.

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

The square root of 520171 is about 721.2288125138. The cubic root of 520171 is about 80.4233288737.

Adding to 520171 its reverse (171025), we get a palindrome (691196).

The spelling of 520171 in words is "five hundred twenty thousand, one hundred seventy-one".