12131144 has 8 divisors (see below), whose sum is σ = 22745910. Its totient is φ = 6065568.

The previous prime is 12131113. The next prime is 12131159. The reversal of 12131144 is 44113121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11303044 + 828100 = 3362^2 + 910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 758189 + ... + 758204.

Almost surely, 2^12131144 is an apocalyptic number.

It is an amenable number.

12131144 is a deficient number, since it is larger than the sum of its proper divisors (10614766).

12131144 is a wasteful number, since it uses less digits than its factorization.

12131144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516399 (or 1516395 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 12131144 is about 3482.9791845488. The cubic root of 12131144 is about 229.7738419649.

Adding to 12131144 its reverse (44113121), we get a palindrome (56244265).

The spelling of 12131144 in words is "twelve million, one hundred thirty-one thousand, one hundred forty-four".