1268241491 has 4 divisors (see below), whose sum is σ = 1383536184. Its totient is φ = 1152946800.

The previous prime is 1268241451. The next prime is 1268241503. The reversal of 1268241491 is 1941428621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1941428621 = 11 ⋅176493511.

It is a cyclic number.

It is not a de Polignac number, because 1268241491 - 2¹⁴ = 1268225107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268241451) 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 in 3 ways as a sum of consecutive naturals, for example, 57647330 + ... + 57647351.

It is an arithmetic number, because the mean of its divisors is an integer number (345884046).

Almost surely, 2^1268241491 is an apocalyptic number.

1268241491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1268241491 is a deficient number, since it is larger than the sum of its proper divisors (115294693).

1268241491 is a wasteful number, since it uses less digits than its factorization.

1268241491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115294692.

The product of its digits is 27648, while the sum is 38.

The square root of 1268241491 is about 35612.3783395605. The cubic root of 1268241491 is about 1082.4320736374.

The spelling of 1268241491 in words is "one billion, two hundred sixty-eight million, two hundred forty-one thousand, four hundred ninety-one".