12944405 has 6 divisors (see below), whose sum is σ = 15542946. Its totient is φ = 10349088.

The previous prime is 12944389. The next prime is 12944443. The reversal of 12944405 is 50444921.

12944405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 8655364 + 4289041 = 2942^2 + 2071^2 .

It is not a de Polignac number, because 12944405 - 2⁴ = 12944389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7241 + ... + 8849.

It is an arithmetic number, because the mean of its divisors is an integer number (2590491).

Almost surely, 2^12944405 is an apocalyptic number.

It is an amenable number.

12944405 is a deficient number, since it is larger than the sum of its proper divisors (2598541).

12944405 is an frugal number, since it uses more digits than its factorization.

12944405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 12944405 is about 3597.8333757972. The cubic root of 12944405 is about 234.7978040477.

The spelling of 12944405 in words is "twelve million, nine hundred forty-four thousand, four hundred five".