12740449 has 2 divisors, whose sum is σ = 12740450. Its totient is φ = 12740448.

The previous prime is 12740423. The next prime is 12740461. The reversal of 12740449 is 94404721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 208849 = 3540^2 + 457^2 .

It is an emirp because it is prime and its reverse (94404721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12740449 - 2¹⁹ = 12216161 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12740449.

It is not a weakly prime, because it can be changed into another prime (12740489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6370224 + 6370225.

It is an arithmetic number, because the mean of its divisors is an integer number (6370225).

Almost surely, 2^12740449 is an apocalyptic number.

It is an amenable number.

12740449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12740449 is an equidigital number, since it uses as much as digits as its factorization.

12740449 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 12740449 is about 3569.3765562070. The cubic root of 12740449 is about 233.5580879743.

The spelling of 12740449 in words is "twelve million, seven hundred forty thousand, four hundred forty-nine".