12531144 has 32 divisors (see below), whose sum is σ = 31799520. Its totient is φ = 4114176.

The previous prime is 12531137. The next prime is 12531149. The reversal of 12531144 is 44113521.

It is a self number, because there is not a number n which added to its sum of digits gives 12531144.

It is not an unprimeable number, because it can be changed into a prime (12531149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2289 + ... + 5504.

It is an arithmetic number, because the mean of its divisors is an integer number (993735).

Almost surely, 2^12531144 is an apocalyptic number.

It is an amenable number.

12531144 is an abundant number, since it is smaller than the sum of its proper divisors (19268376).

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

12531144 is a wasteful number, since it uses less digits than its factorization.

12531144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7869 (or 7865 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 12531144 is about 3539.9355926344. The cubic root of 12531144 is about 232.2720253506.

Adding to 12531144 its reverse (44113521), we get a palindrome (56644665).

The spelling of 12531144 in words is "twelve million, five hundred thirty-one thousand, one hundred forty-four".