1312120143 has 6 divisors (see below), whose sum is σ = 1895284664. Its totient is φ = 874746756.

The previous prime is 1312120133. The next prime is 1312120153. The reversal of 1312120143 is 3410212131.

It is an interprime number because it is at equal distance from previous prime (1312120133) and next prime (1312120153).

It is not a de Polignac number, because 1312120143 - 2⁴ = 1312120127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312120133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72895555 + ... + 72895572.

Almost surely, 2^1312120143 is an apocalyptic number.

1312120143 is a deficient number, since it is larger than the sum of its proper divisors (583164521).

1312120143 is a wasteful number, since it uses less digits than its factorization.

1312120143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145791133 (or 145791130 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1312120143 is about 36223.1989614391. The cubic root of 1312120143 is about 1094.7741499550.

Adding to 1312120143 its reverse (3410212131), we get a palindrome (4722332274).

The spelling of 1312120143 in words is "one billion, three hundred twelve million, one hundred twenty thousand, one hundred forty-three".