12001291 has 2 divisors, whose sum is σ = 12001292. Its totient is φ = 12001290.

The previous prime is 12001289. The next prime is 12001307. The reversal of 12001291 is 19210021.

12001291 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12001307) can be obtained adding 12001291 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001291 - 2¹ = 12001289 is a prime.

Together with 12001289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12001211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000645 + 6000646.

It is an arithmetic number, because the mean of its divisors is an integer number (6000646).

Almost surely, 2^12001291 is an apocalyptic number.

12001291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001291 is an equidigital number, since it uses as much as digits as its factorization.

12001291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 12001291 is about 3464.2879499256. The cubic root of 12001291 is about 228.9510583612.

The spelling of 12001291 in words is "twelve million, one thousand, two hundred ninety-one".