8520117 has 4 divisors (see below), whose sum is σ = 11360160. Its totient is φ = 5680076.

The previous prime is 8520107. The next prime is 8520139. The reversal of 8520117 is 7110258.

8520117 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 8520117 - 2⁷ = 8519989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8520107) 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, 1420017 + ... + 1420022.

It is an arithmetic number, because the mean of its divisors is an integer number (2840040).

Almost surely, 2^8520117 is an apocalyptic number.

It is an amenable number.

8520117 is a deficient number, since it is larger than the sum of its proper divisors (2840043).

8520117 is a wasteful number, since it uses less digits than its factorization.

8520117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840042.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 8520117 is about 2918.9239455662. The cubic root of 8520117 is about 204.2436295340.

It can be divided in two parts, 85 and 20117, that added together give a palindrome (20202).

The spelling of 8520117 in words is "eight million, five hundred twenty thousand, one hundred seventeen".