1268415539 has 2 divisors, whose sum is σ = 1268415540. Its totient is φ = 1268415538.

The previous prime is 1268415487. The next prime is 1268415559. The reversal of 1268415539 is 9355148621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1268415539 - 2²⁰ = 1267366963 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1268415539.

It is not a weakly prime, because it can be changed into another prime (1268415559) by changing a digit.

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 as a sum of consecutive naturals, namely, 634207769 + 634207770.

It is an arithmetic number, because the mean of its divisors is an integer number (634207770).

Almost surely, 2^1268415539 is an apocalyptic number.

1268415539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268415539 is an equidigital number, since it uses as much as digits as its factorization.

1268415539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The square root of 1268415539 is about 35614.8219004391. The cubic root of 1268415539 is about 1082.4815874777.

The spelling of 1268415539 in words is "one billion, two hundred sixty-eight million, four hundred fifteen thousand, five hundred thirty-nine".