12649291 has 2 divisors, whose sum is σ = 12649292. Its totient is φ = 12649290.

The previous prime is 12649277. The next prime is 12649297. The reversal of 12649291 is 19294621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12649291 - 2¹⁵ = 12616523 is a prime.

It is not a weakly prime, because it can be changed into another prime (12649297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324645 + 6324646.

It is an arithmetic number, because the mean of its divisors is an integer number (6324646).

Almost surely, 2^12649291 is an apocalyptic number.

12649291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649291 is an equidigital number, since it uses as much as digits as its factorization.

12649291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 12649291 is about 3556.5841758631. The cubic root of 12649291 is about 232.9997175606. Note that the first 3 decimals are identical.

The spelling of 12649291 in words is "twelve million, six hundred forty-nine thousand, two hundred ninety-one".