1276988159 has 2 divisors, whose sum is σ = 1276988160. Its totient is φ = 1276988158.

The previous prime is 1276988149. The next prime is 1276988161. The reversal of 1276988159 is 9518896721.

It is a strong prime.

It is an emirp because it is prime and its reverse (9518896721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1276988159 - 2⁸ = 1276987903 is a prime.

Together with 1276988161, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276988149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638494079 + 638494080.

It is an arithmetic number, because the mean of its divisors is an integer number (638494080).

Almost surely, 2^1276988159 is an apocalyptic number.

1276988159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276988159 is an equidigital number, since it uses as much as digits as its factorization.

1276988159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 56.

The square root of 1276988159 is about 35734.9710927545. The cubic root of 1276988159 is about 1084.9147742525.

The spelling of 1276988159 in words is "one billion, two hundred seventy-six million, nine hundred eighty-eight thousand, one hundred fifty-nine".