12486191 has 2 divisors, whose sum is σ = 12486192. Its totient is φ = 12486190.

The previous prime is 12486167. The next prime is 12486209. The reversal of 12486191 is 19168421.

It is a strong prime.

It is an emirp because it is prime and its reverse (19168421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12486191 - 2⁶ = 12486127 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12486121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6243095 + 6243096.

It is an arithmetic number, because the mean of its divisors is an integer number (6243096).

Almost surely, 2^12486191 is an apocalyptic number.

12486191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12486191 is an equidigital number, since it uses as much as digits as its factorization.

12486191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 12486191 is about 3533.5804787779. The cubic root of 12486191 is about 231.9939492576.

The spelling of 12486191 in words is "twelve million, four hundred eighty-six thousand, one hundred ninety-one".