12311144 has 8 divisors (see below), whose sum is σ = 23083410. Its totient is φ = 6155568.

The previous prime is 12311137. The next prime is 12311147. The reversal of 12311144 is 44111321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 131044 = 3490^2 + 362^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12311147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769439 + ... + 769454.

Almost surely, 2^12311144 is an apocalyptic number.

It is an amenable number.

12311144 is a deficient number, since it is larger than the sum of its proper divisors (10772266).

12311144 is a wasteful number, since it uses less digits than its factorization.

12311144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538899 (or 1538895 counting only the distinct ones).

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

The square root of 12311144 is about 3508.7239845847. The cubic root of 12311144 is about 230.9047163605.

Adding to 12311144 its reverse (44111321), we get a palindrome (56422465).

The spelling of 12311144 in words is "twelve million, three hundred eleven thousand, one hundred forty-four".