12909144 has 32 divisors (see below), whose sum is σ = 33315840. Its totient is φ = 4164000.

The previous prime is 12909139. The next prime is 12909163. The reversal of 12909144 is 44190921.

12909144 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7932 + ... + 9419.

It is an arithmetic number, because the mean of its divisors is an integer number (1041120).

Almost surely, 2^12909144 is an apocalyptic number.

It is an amenable number.

12909144 is an abundant number, since it is smaller than the sum of its proper divisors (20406696).

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

12909144 is a wasteful number, since it uses less digits than its factorization.

12909144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17391 (or 17387 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 12909144 is about 3592.9297237770. The cubic root of 12909144 is about 234.5844110959.

The spelling of 12909144 in words is "twelve million, nine hundred nine thousand, one hundred forty-four".