1268241459281 has 2 divisors, whose sum is σ = 1268241459282. Its totient is φ = 1268241459280.

The previous prime is 1268241459269. The next prime is 1268241459301. The reversal of 1268241459281 is 1829541428621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1078980787600 + 189260671681 = 1038740^2 + 435041^2 .

It is an emirp because it is prime and its reverse (1829541428621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1268241459281 - 2²² = 1268237264977 is a prime.

It is a super-2 number, since 2×1268241459281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1268241459181) 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, 634120729640 + 634120729641.

It is an arithmetic number, because the mean of its divisors is an integer number (634120729641).

Almost surely, 2^{1268241459281} is an apocalyptic number.

It is an amenable number.

1268241459281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268241459281 is an equidigital number, since it uses as much as digits as its factorization.

1268241459281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 53.

The spelling of 1268241459281 in words is "one trillion, two hundred sixty-eight billion, two hundred forty-one million, four hundred fifty-nine thousand, two hundred eighty-one".