12956517 has 28 divisors (see below), whose sum is σ = 22209760. Its totient is φ = 7400808.

The previous prime is 12956509. The next prime is 12956563. The reversal of 12956517 is 71565921.

It is not a de Polignac number, because 12956517 - 2³ = 12956509 is a prime.

It is a super-3 number, since 3×12956517³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12956597) 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 in 27 ways as a sum of consecutive naturals, for example, 3834 + ... + 6372.

Almost surely, 2^12956517 is an apocalyptic number.

It is an amenable number.

12956517 is a deficient number, since it is larger than the sum of its proper divisors (9253243).

12956517 is an frugal number, since it uses more digits than its factorization.

12956517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 2549 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 12956517 is about 3599.5162174937. The cubic root of 12956517 is about 234.8710141712.

The spelling of 12956517 in words is "twelve million, nine hundred fifty-six thousand, five hundred seventeen".