12427189 has 2 divisors, whose sum is σ = 12427190. Its totient is φ = 12427188.

The previous prime is 12427183. The next prime is 12427193. The reversal of 12427189 is 98172421.

12427189 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 935089 = 3390^2 + 967^2 .

It is an emirp because it is prime and its reverse (98172421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12427189 - 2²³ = 4038581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12427183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6213594 + 6213595.

It is an arithmetic number, because the mean of its divisors is an integer number (6213595).

Almost surely, 2^12427189 is an apocalyptic number.

It is an amenable number.

12427189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12427189 is an equidigital number, since it uses as much as digits as its factorization.

12427189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 12427189 is about 3525.2218369913. The cubic root of 12427189 is about 231.6279522860.

The spelling of 12427189 in words is "twelve million, four hundred twenty-seven thousand, one hundred eighty-nine".