1280718113 has 2 divisors, whose sum is σ = 1280718114. Its totient is φ = 1280718112.

The previous prime is 1280718091. The next prime is 1280718143. The reversal of 1280718113 is 3118170821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1228993249 + 51724864 = 35057^2 + 7192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280718113 - 2²⁰ = 1279669537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1280718113.

It is not a weakly prime, because it can be changed into another prime (1280718143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640359056 + 640359057.

It is an arithmetic number, because the mean of its divisors is an integer number (640359057).

Almost surely, 2^1280718113 is an apocalyptic number.

It is an amenable number.

1280718113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280718113 is an equidigital number, since it uses as much as digits as its factorization.

1280718113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 1280718113 is about 35787.1221670589. The cubic root of 1280718113 is about 1085.9700564466.

Adding to 1280718113 its reverse (3118170821), we get a palindrome (4398888934).

The spelling of 1280718113 in words is "one billion, two hundred eighty million, seven hundred eighteen thousand, one hundred thirteen".