12956621 has 2 divisors, whose sum is σ = 12956622. Its totient is φ = 12956620.

The previous prime is 12956617. The next prime is 12956627. The reversal of 12956621 is 12665921.

It is a happy number.

12956621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10982596 + 1974025 = 3314^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 12956621 - 2² = 12956617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12956627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478310 + 6478311.

It is an arithmetic number, because the mean of its divisors is an integer number (6478311).

Almost surely, 2^12956621 is an apocalyptic number.

It is an amenable number.

12956621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12956621 is an equidigital number, since it uses as much as digits as its factorization.

12956621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 12956621 is about 3599.5306638505. The cubic root of 12956621 is about 234.8716425942.

The spelling of 12956621 in words is "twelve million, nine hundred fifty-six thousand, six hundred twenty-one".