12815171 has 2 divisors, whose sum is σ = 12815172. Its totient is φ = 12815170.

The previous prime is 12815167. The next prime is 12815191. The reversal of 12815171 is 17151821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12815171 - 2² = 12815167 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12815171.

It is not a weakly prime, because it can be changed into another prime (12815111) 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 as a sum of consecutive naturals, namely, 6407585 + 6407586.

It is an arithmetic number, because the mean of its divisors is an integer number (6407586).

Almost surely, 2^12815171 is an apocalyptic number.

12815171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12815171 is an equidigital number, since it uses as much as digits as its factorization.

12815171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 26.

The square root of 12815171 is about 3579.8283478402. The cubic root of 12815171 is about 234.0137998047.

Adding to 12815171 its reverse (17151821), we get a palindrome (29966992).

The spelling of 12815171 in words is "twelve million, eight hundred fifteen thousand, one hundred seventy-one".