1291159659 has 48 divisors (see below), whose sum is σ = 1864293984. Its totient is φ = 793728000.

The previous prime is 1291159633. The next prime is 1291159697. The reversal of 1291159659 is 9569511921.

1291159659 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1291159659 - 2⁹ = 1291159147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1291159619) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12783709 + ... + 12783809.

It is an arithmetic number, because the mean of its divisors is an integer number (38839458).

Almost surely, 2^1291159659 is an apocalyptic number.

1291159659 is a deficient number, since it is larger than the sum of its proper divisors (573134325).

1291159659 is a wasteful number, since it uses less digits than its factorization.

1291159659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 235 counting only the distinct ones).

The product of its digits is 218700, while the sum is 48.

The square root of 1291159659 is about 35932.7101538417. The cubic root of 1291159659 is about 1088.9133347170.

The spelling of 1291159659 in words is "one billion, two hundred ninety-one million, one hundred fifty-nine thousand, six hundred fifty-nine".