12911291 has 8 divisors (see below), whose sum is σ = 13193904. Its totient is φ = 12631680.

The previous prime is 12911287. The next prime is 12911329. The reversal of 12911291 is 19211921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12911291 - 2² = 12911287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12911291.

It is not an unprimeable number, because it can be changed into a prime (12911251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9356 + ... + 10646.

It is an arithmetic number, because the mean of its divisors is an integer number (1649238).

Almost surely, 2^12911291 is an apocalyptic number.

12911291 is a deficient number, since it is larger than the sum of its proper divisors (282613).

12911291 is a wasteful number, since it uses less digits than its factorization.

12911291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501.

The product of its digits is 324, while the sum is 26.

The square root of 12911291 is about 3593.2284925955. The cubic root of 12911291 is about 234.5974154389.

The spelling of 12911291 in words is "twelve million, nine hundred eleven thousand, two hundred ninety-one".