12999291 has 4 divisors (see below), whose sum is σ = 17332392. Its totient is φ = 8666192.

The previous prime is 12999289. The next prime is 12999313. The reversal of 12999291 is 19299921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12999291 - 2¹ = 12999289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12999241) 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, 2166546 + ... + 2166551.

It is an arithmetic number, because the mean of its divisors is an integer number (4333098).

Almost surely, 2^12999291 is an apocalyptic number.

12999291 is a deficient number, since it is larger than the sum of its proper divisors (4333101).

12999291 is an equidigital number, since it uses as much as digits as its factorization.

12999291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333100.

The product of its digits is 26244, while the sum is 42.

The square root of 12999291 is about 3605.4529535136. The cubic root of 12999291 is about 235.1291940885.

The spelling of 12999291 in words is "twelve million, nine hundred ninety-nine thousand, two hundred ninety-one".