1312542143 has 32 divisors (see below), whose sum is σ = 1508855040. Its totient is φ = 1131232000.

The previous prime is 1312542089. The next prime is 1312542151. The reversal of 1312542143 is 3412452131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1312542143 - 2¹⁰ = 1312541119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312542193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2846933 + ... + 2847393.

It is an arithmetic number, because the mean of its divisors is an integer number (47151720).

Almost surely, 2^1312542143 is an apocalyptic number.

1312542143 is a deficient number, since it is larger than the sum of its proper divisors (196312897).

1312542143 is a wasteful number, since it uses less digits than its factorization.

1312542143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679.

The product of its digits is 2880, while the sum is 26.

The square root of 1312542143 is about 36229.0234894621. The cubic root of 1312542143 is about 1094.8915033275.

Adding to 1312542143 its reverse (3412452131), we get a palindrome (4724994274).

The spelling of 1312542143 in words is "one billion, three hundred twelve million, five hundred forty-two thousand, one hundred forty-three".