12956617 has 2 divisors, whose sum is σ = 12956618. Its totient is φ = 12956616.

The previous prime is 12956611. The next prime is 12956621. The reversal of 12956617 is 71665921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7485696 + 5470921 = 2736^2 + 2339^2 .

It is an emirp because it is prime and its reverse (71665921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12956617 - 2¹¹ = 12954569 is a prime.

It is not a weakly prime, because it can be changed into another prime (12956611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478308 + 6478309.

It is an arithmetic number, because the mean of its divisors is an integer number (6478309).

Almost surely, 2^12956617 is an apocalyptic number.

It is an amenable number.

12956617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12956617 is an equidigital number, since it uses as much as digits as its factorization.

12956617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 12956617 is about 3599.5301082225. The cubic root of 12956617 is about 234.8716184242.

The spelling of 12956617 in words is "twelve million, nine hundred fifty-six thousand, six hundred seventeen".