12543191 has 2 divisors, whose sum is σ = 12543192. Its totient is φ = 12543190.

The previous prime is 12543151. The next prime is 12543197. The reversal of 12543191 is 19134521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12543191 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12543191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271595 + 6271596.

It is an arithmetic number, because the mean of its divisors is an integer number (6271596).

Almost surely, 2^12543191 is an apocalyptic number.

12543191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543191 is an equidigital number, since it uses as much as digits as its factorization.

12543191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 12543191 is about 3541.6367685013. The cubic root of 12543191 is about 232.3464342228.

The spelling of 12543191 in words is "twelve million, five hundred forty-three thousand, one hundred ninety-one".