12289247 has 2 divisors, whose sum is σ = 12289248. Its totient is φ = 12289246.

The previous prime is 12289213. The next prime is 12289253. The reversal of 12289247 is 74298221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12289247 - 2⁶ = 12289183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12289267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6144623 + 6144624.

It is an arithmetic number, because the mean of its divisors is an integer number (6144624).

Almost surely, 2^12289247 is an apocalyptic number.

12289247 is a deficient number, since it is larger than the sum of its proper divisors (1).

12289247 is an equidigital number, since it uses as much as digits as its factorization.

12289247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 12289247 is about 3505.6022307159. The cubic root of 12289247 is about 230.7677369106.

The spelling of 12289247 in words is "twelve million, two hundred eighty-nine thousand, two hundred forty-seven".