12544409 has 2 divisors, whose sum is σ = 12544410. Its totient is φ = 12544408.

The previous prime is 12544387. The next prime is 12544423. The reversal of 12544409 is 90444521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6615184 + 5929225 = 2572^2 + 2435^2 .

It is an emirp because it is prime and its reverse (90444521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12544409 - 2²⁰ = 11495833 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12544109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272204 + 6272205.

It is an arithmetic number, because the mean of its divisors is an integer number (6272205).

Almost surely, 2^12544409 is an apocalyptic number.

It is an amenable number.

12544409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12544409 is an equidigital number, since it uses as much as digits as its factorization.

12544409 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12544409 is about 3541.8087187199. The cubic root of 12544409 is about 232.3539546057.

The spelling of 12544409 in words is "twelve million, five hundred forty-four thousand, four hundred nine".