12428191 has 2 divisors, whose sum is σ = 12428192. Its totient is φ = 12428190.

The previous prime is 12428137. The next prime is 12428197. The reversal of 12428191 is 19182421.

It is a strong prime.

It is an emirp because it is prime and its reverse (19182421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12428191 - 2¹¹ = 12426143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12428197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6214095 + 6214096.

It is an arithmetic number, because the mean of its divisors is an integer number (6214096).

Almost surely, 2^12428191 is an apocalyptic number.

12428191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12428191 is an equidigital number, since it uses as much as digits as its factorization.

12428191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

The square root of 12428191 is about 3525.3639528423. The cubic root of 12428191 is about 231.6341774796.

The spelling of 12428191 in words is "twelve million, four hundred twenty-eight thousand, one hundred ninety-one".