12744409 has 2 divisors, whose sum is σ = 12744410. Its totient is φ = 12744408.

The previous prime is 12744397. The next prime is 12744419. The reversal of 12744409 is 90444721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7546009 + 5198400 = 2747^2 + 2280^2 .

It is a cyclic number.

It is not a de Polignac number, because 12744409 - 2⁵ = 12744377 is a prime.

It is not a weakly prime, because it can be changed into another prime (12744419) 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, 6372204 + 6372205.

It is an arithmetic number, because the mean of its divisors is an integer number (6372205).

Almost surely, 2^12744409 is an apocalyptic number.

It is an amenable number.

12744409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12744409 is an equidigital number, since it uses as much as digits as its factorization.

12744409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 12744409 is about 3569.9312318307. The cubic root of 12744409 is about 233.5822837259.

The spelling of 12744409 in words is "twelve million, seven hundred forty-four thousand, four hundred nine".