1312012144 has 20 divisors (see below), whose sum is σ = 2596110624. Its totient is φ = 642048128.

The previous prime is 1312012139. The next prime is 1312012153. The reversal of 1312012144 is 4412102131.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 871597 + ... + 873100.

Almost surely, 2^1312012144 is an apocalyptic number.

It is an amenable number.

1312012144 is a deficient number, since it is larger than the sum of its proper divisors (1284098480).

1312012144 is a wasteful number, since it uses less digits than its factorization.

1312012144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744752 (or 1744746 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1312012144 is about 36221.7081872183. The cubic root of 1312012144 is about 1094.7441126249.

Adding to 1312012144 its reverse (4412102131), we get a palindrome (5724114275).

The spelling of 1312012144 in words is "one billion, three hundred twelve million, twelve thousand, one hundred forty-four".