1280418091 has 2 divisors, whose sum is σ = 1280418092. Its totient is φ = 1280418090.

The previous prime is 1280418023. The next prime is 1280418103. The reversal of 1280418091 is 1908140821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1280418091 - 2¹³ = 1280409899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1280218091) 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, 640209045 + 640209046.

It is an arithmetic number, because the mean of its divisors is an integer number (640209046).

Almost surely, 2^1280418091 is an apocalyptic number.

1280418091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280418091 is an equidigital number, since it uses as much as digits as its factorization.

1280418091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1280418091 is about 35782.9301622995. The cubic root of 1280418091 is about 1085.8852497667.

The spelling of 1280418091 in words is "one billion, two hundred eighty million, four hundred eighteen thousand, ninety-one".