8517161 has 4 divisors (see below), whose sum is σ = 8523732. Its totient is φ = 8510592.

The previous prime is 8517137. The next prime is 8517163. The reversal of 8517161 is 1617158.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1617158 = 2 ⋅808579.

It can be written as a sum of positive squares in 2 ways, for example, as 5973136 + 2544025 = 2444^2 + 1595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8517161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8517163) 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, 620 + ... + 4173.

It is an arithmetic number, because the mean of its divisors is an integer number (2130933).

Almost surely, 2^8517161 is an apocalyptic number.

It is an amenable number.

8517161 is a deficient number, since it is larger than the sum of its proper divisors (6571).

8517161 is a wasteful number, since it uses less digits than its factorization.

8517161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570.

The product of its digits is 1680, while the sum is 29.

The square root of 8517161 is about 2918.4175506599. The cubic root of 8517161 is about 204.2200064623.

The spelling of 8517161 in words is "eight million, five hundred seventeen thousand, one hundred sixty-one".