1312441243 has 2 divisors, whose sum is σ = 1312441244. Its totient is φ = 1312441242.

The previous prime is 1312441223. The next prime is 1312441267. The reversal of 1312441243 is 3421442131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312441243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312441223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656220621 + 656220622.

It is an arithmetic number, because the mean of its divisors is an integer number (656220622).

Almost surely, 2^1312441243 is an apocalyptic number.

1312441243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312441243 is an equidigital number, since it uses as much as digits as its factorization.

1312441243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 1312441243 is about 36227.6309327563. The cubic root of 1312441243 is about 1094.8634464802.

Adding to 1312441243 its reverse (3421442131), we get a palindrome (4733883374).

The spelling of 1312441243 in words is "one billion, three hundred twelve million, four hundred forty-one thousand, two hundred forty-three".