12288391 has 2 divisors, whose sum is σ = 12288392. Its totient is φ = 12288390.

The previous prime is 12288379. The next prime is 12288401. The reversal of 12288391 is 19388221.

12288391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (19388221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12288391 - 2⁵ = 12288359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12288301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6144195 + 6144196.

It is an arithmetic number, because the mean of its divisors is an integer number (6144196).

Almost surely, 2^12288391 is an apocalyptic number.

12288391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12288391 is an equidigital number, since it uses as much as digits as its factorization.

12288391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 12288391 is about 3505.4801382977. The cubic root of 12288391 is about 230.7623787909.

The spelling of 12288391 in words is "twelve million, two hundred eighty-eight thousand, three hundred ninety-one".