1291327106 has 16 divisors (see below), whose sum is σ = 2051951616. Its totient is φ = 607381056.

The previous prime is 1291327099. The next prime is 1291327133. The reversal of 1291327106 is 6017231921.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 69455 + ... + 86061.

It is an arithmetic number, because the mean of its divisors is an integer number (128246976).

Almost surely, 2^1291327106 is an apocalyptic number.

1291327106 is a deficient number, since it is larger than the sum of its proper divisors (760624510).

1291327106 is a wasteful number, since it uses less digits than its factorization.

1291327106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18913.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1291327106 is about 35935.0400862445. The cubic root of 1291327106 is about 1088.9604054228.

The spelling of 1291327106 in words is "one billion, two hundred ninety-one million, three hundred twenty-seven thousand, one hundred six".