12591944 has 16 divisors (see below), whose sum is σ = 23784300. Its totient is φ = 6249472.

The previous prime is 12591937. The next prime is 12591947. The reversal of 12591944 is 44919521.

It can be written as a sum of positive squares in 2 ways, for example, as 12460900 + 131044 = 3530^2 + 362^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12591947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4649 + ... + 6840.

Almost surely, 2^12591944 is an apocalyptic number.

It is an amenable number.

12591944 is a deficient number, since it is larger than the sum of its proper divisors (11192356).

12591944 is a wasteful number, since it uses less digits than its factorization.

12591944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11632 (or 11628 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 12591944 is about 3548.5129279742. The cubic root of 12591944 is about 232.6470738622.

The spelling of 12591944 in words is "twelve million, five hundred ninety-one thousand, nine hundred forty-four".