1312541543 has 2 divisors, whose sum is σ = 1312541544. Its totient is φ = 1312541542.

The previous prime is 1312541539. The next prime is 1312541557. The reversal of 1312541543 is 3451452131.

It is a weak prime.

It is an emirp because it is prime and its reverse (3451452131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1312541543 - 2² = 1312541539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312541143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656270771 + 656270772.

It is an arithmetic number, because the mean of its divisors is an integer number (656270772).

Almost surely, 2^1312541543 is an apocalyptic number.

1312541543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312541543 is an equidigital number, since it uses as much as digits as its factorization.

1312541543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 1312541543 is about 36229.0152088074. The cubic root of 1312541543 is about 1094.8913364922.

Adding to 1312541543 its reverse (3451452131), we get a palindrome (4763993674).

The spelling of 1312541543 in words is "one billion, three hundred twelve million, five hundred forty-one thousand, five hundred forty-three".