1280134124449 has 2 divisors, whose sum is σ = 1280134124450. Its totient is φ = 1280134124448.

The previous prime is 1280134124441. The next prime is 1280134124471. The reversal of 1280134124449 is 9444214310821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1168215105600 + 111919018849 = 1080840^2 + 334543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280134124449 - 2³ = 1280134124441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1280134124441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640067062224 + 640067062225.

It is an arithmetic number, because the mean of its divisors is an integer number (640067062225).

Almost surely, 2^{1280134124449} is an apocalyptic number.

It is an amenable number.

1280134124449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280134124449 is an equidigital number, since it uses as much as digits as its factorization.

1280134124449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 1280134124449 in words is "one trillion, two hundred eighty billion, one hundred thirty-four million, one hundred twenty-four thousand, four hundred forty-nine".