1291292419 has 2 divisors, whose sum is σ = 1291292420. Its totient is φ = 1291292418.

The previous prime is 1291292413. The next prime is 1291292423. The reversal of 1291292419 is 9142921921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1291292419 - 2³ = 1291292411 is a prime.

It is a super-2 number, since 2×1291292419² = 3334872222733743122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1291292411) 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, 645646209 + 645646210.

It is an arithmetic number, because the mean of its divisors is an integer number (645646210).

Almost surely, 2^1291292419 is an apocalyptic number.

1291292419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291292419 is an equidigital number, since it uses as much as digits as its factorization.

1291292419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 1291292419 is about 35934.5574482280. The cubic root of 1291292419 is about 1088.9506549608.

The spelling of 1291292419 in words is "one billion, two hundred ninety-one million, two hundred ninety-two thousand, four hundred nineteen".