1291307158 has 16 divisors (see below), whose sum is σ = 2006966160. Its totient is φ = 622731616.

The previous prime is 1291307057. The next prime is 1291307183. The reversal of 1291307158 is 8517031921.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 96985 + ... + 109492.

It is an arithmetic number, because the mean of its divisors is an integer number (125435385).

Almost surely, 2^1291307158 is an apocalyptic number.

1291307158 is a deficient number, since it is larger than the sum of its proper divisors (715659002).

1291307158 is a wasteful number, since it uses less digits than its factorization.

1291307158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206591.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 1291307158 is about 35934.7625287826. The cubic root of 1291307158 is about 1088.9547980922.

The spelling of 1291307158 in words is "one billion, two hundred ninety-one million, three hundred seven thousand, one hundred fifty-eight".