521117 has 4 divisors (see below), whose sum is σ = 533280. Its totient is φ = 508956.

The previous prime is 521107. The next prime is 521119. The reversal of 521117 is 711125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521095 and 521104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521119) 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, 6017 + ... + 6102.

It is an arithmetic number, because the mean of its divisors is an integer number (133320).

2⁵²¹¹¹⁷ is an apocalyptic number.

It is an amenable number.

521117 is a deficient number, since it is larger than the sum of its proper divisors (12163).

521117 is a wasteful number, since it uses less digits than its factorization.

521117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12162.

The product of its digits is 70, while the sum is 17.

The square root of 521117 is about 721.8843397664. The cubic root of 521117 is about 80.4720528477.

The spelling of 521117 in words is "five hundred twenty-one thousand, one hundred seventeen".