12665344 has 40 divisors (see below), whose sum is σ = 26209260. Its totient is φ = 6107136.

The previous prime is 12665311. The next prime is 12665363. The reversal of 12665344 is 44356621.

It can be written as a sum of positive squares in 2 ways, for example, as 11833600 + 831744 = 3440^2 + 912^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14422 + ... + 15274.

Almost surely, 2^12665344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12665344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13104630).

12665344 is an abundant number, since it is smaller than the sum of its proper divisors (13543916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12665344 is an frugal number, since it uses more digits than its factorization.

12665344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 884 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 12665344 is about 3558.8402605343. The cubic root of 12665344 is about 233.0982412199.

The spelling of 12665344 in words is "twelve million, six hundred sixty-five thousand, three hundred forty-four".