1291496419 has 4 divisors (see below), whose sum is σ = 1303345120. Its totient is φ = 1279647720.

The previous prime is 1291496413. The next prime is 1291496431. The reversal of 1291496419 is 9146941921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1291496419 - 2⁵ = 1291496387 is a prime.

It is a super-2 number, since 2×1291496419² = 3335926000579647122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291496413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5924187 + ... + 5924404.

It is an arithmetic number, because the mean of its divisors is an integer number (325836280).

Almost surely, 2^1291496419 is an apocalyptic number.

1291496419 is a deficient number, since it is larger than the sum of its proper divisors (11848701).

1291496419 is a wasteful number, since it uses less digits than its factorization.

1291496419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11848700.

The product of its digits is 139968, while the sum is 46.

The square root of 1291496419 is about 35937.3958294142. The cubic root of 1291496419 is about 1089.0079965391.

The spelling of 1291496419 in words is "one billion, two hundred ninety-one million, four hundred ninety-six thousand, four hundred nineteen".