12509144 has 64 divisors (see below), whose sum is σ = 26956800. Its totient is φ = 5405184.

The previous prime is 12509143. The next prime is 12509149. The reversal of 12509144 is 44190521.

It is a super-2 number, since 2×12509144² = 312957367225472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121397 + ... + 121499.

It is an arithmetic number, because the mean of its divisors is an integer number (421200).

Almost surely, 2^12509144 is an apocalyptic number.

It is an amenable number.

12509144 is an abundant number, since it is smaller than the sum of its proper divisors (14447656).

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

12509144 is a wasteful number, since it uses less digits than its factorization.

12509144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 12509144 is about 3536.8268264081. The cubic root of 12509144 is about 232.1360181383.

Adding to 12509144 its reverse (44190521), we get a palindrome (56699665).

The spelling of 12509144 in words is "twelve million, five hundred nine thousand, one hundred forty-four".