1291307159 has 4 divisors (see below), whose sum is σ = 1299973800. Its totient is φ = 1282640520.

The previous prime is 1291307057. The next prime is 1291307183. The reversal of 1291307159 is 9517031921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9517031921 = 281 ⋅33868441.

It is a cyclic number.

It is not a de Polignac number, because 1291307159 - 2²⁰ = 1290258583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291307959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4333097 + ... + 4333394.

It is an arithmetic number, because the mean of its divisors is an integer number (324993450).

Almost surely, 2^1291307159 is an apocalyptic number.

1291307159 is a deficient number, since it is larger than the sum of its proper divisors (8666641).

1291307159 is an equidigital number, since it uses as much as digits as its factorization.

1291307159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8666640.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 1291307159 is about 35934.7625426967. The cubic root of 1291307159 is about 1088.9547983733.

The spelling of 1291307159 in words is "one billion, two hundred ninety-one million, three hundred seven thousand, one hundred fifty-nine".