12521144 has 16 divisors (see below), whose sum is σ = 23920920. Its totient is φ = 6142240.

The previous prime is 12521141. The next prime is 12521149. The reversal of 12521144 is 44112521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14342 + ... + 15189.

Almost surely, 2^12521144 is an apocalyptic number.

It is an amenable number.

12521144 is a deficient number, since it is larger than the sum of its proper divisors (11399776).

12521144 is a wasteful number, since it uses less digits than its factorization.

12521144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29590 (or 29586 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 12521144 is about 3538.5228556560. The cubic root of 12521144 is about 232.2102236406.

Adding to 12521144 its reverse (44112521), we get a palindrome (56633665).

The spelling of 12521144 in words is "twelve million, five hundred twenty-one thousand, one hundred forty-four".