12744009 has 12 divisors (see below), whose sum is σ = 18756036. Its totient is φ = 8335392.

The previous prime is 12743977. The next prime is 12744019. The reversal of 12744009 is 90044721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5774409 + 6969600 = 2403^2 + 2640^2 .

It is not a de Polignac number, because 12744009 - 2⁵ = 12743977 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12744019) 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 in 11 ways as a sum of consecutive naturals, for example, 12882 + ... + 13835.

It is an arithmetic number, because the mean of its divisors is an integer number (1563003).

Almost surely, 2^12744009 is an apocalyptic number.

It is an amenable number.

12744009 is a deficient number, since it is larger than the sum of its proper divisors (6012027).

12744009 is a wasteful number, since it uses less digits than its factorization.

12744009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26776 (or 26773 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12744009 is about 3569.8752079029. The cubic root of 12744009 is about 233.5798399382.

The spelling of 12744009 in words is "twelve million, seven hundred forty-four thousand, nine".