12143291 has 2 divisors, whose sum is σ = 12143292. Its totient is φ = 12143290.

The previous prime is 12143251. The next prime is 12143297. The reversal of 12143291 is 19234121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12143291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12143297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071645 + 6071646.

It is an arithmetic number, because the mean of its divisors is an integer number (6071646).

Almost surely, 2^12143291 is an apocalyptic number.

12143291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12143291 is an equidigital number, since it uses as much as digits as its factorization.

12143291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 12143291 is about 3484.7225140605. The cubic root of 12143291 is about 229.8505077711.

The spelling of 12143291 in words is "twelve million, one hundred forty-three thousand, two hundred ninety-one".