12945617 has 2 divisors, whose sum is σ = 12945618. Its totient is φ = 12945616.

The previous prime is 12945613. The next prime is 12945637. The reversal of 12945617 is 71654921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12082576 + 863041 = 3476^2 + 929^2 .

It is a cyclic number.

It is not a de Polignac number, because 12945617 - 2² = 12945613 is a prime.

It is not a weakly prime, because it can be changed into another prime (12945613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472808 + 6472809.

It is an arithmetic number, because the mean of its divisors is an integer number (6472809).

Almost surely, 2^12945617 is an apocalyptic number.

It is an amenable number.

12945617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12945617 is an equidigital number, since it uses as much as digits as its factorization.

12945617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 12945617 is about 3598.0018065587. The cubic root of 12945617 is about 234.8051319514.

The spelling of 12945617 in words is "twelve million, nine hundred forty-five thousand, six hundred seventeen".