12309144 has 32 divisors (see below), whose sum is σ = 31356720. Its totient is φ = 4025216.

The previous prime is 12309133. The next prime is 12309179. The reversal of 12309144 is 44190321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567 + ... + 6110.

Almost surely, 2^12309144 is an apocalyptic number.

It is an amenable number.

12309144 is an abundant number, since it is smaller than the sum of its proper divisors (19047576).

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

12309144 is a wasteful number, since it uses less digits than its factorization.

12309144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9739 (or 9735 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12309144 is about 3508.4389691143. The cubic root of 12309144 is about 230.8922118512.

Adding to 12309144 its reverse (44190321), we get a palindrome (56499465).

The spelling of 12309144 in words is "twelve million, three hundred nine thousand, one hundred forty-four".