12115399 has 2 divisors, whose sum is σ = 12115400. Its totient is φ = 12115398.

The previous prime is 12115387. The next prime is 12115421. The reversal of 12115399 is 99351121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99351121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12115399 - 2¹¹ = 12113351 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12115399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12115309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6057699 + 6057700.

It is an arithmetic number, because the mean of its divisors is an integer number (6057700).

Almost surely, 2^12115399 is an apocalyptic number.

12115399 is a deficient number, since it is larger than the sum of its proper divisors (1).

12115399 is an equidigital number, since it uses as much as digits as its factorization.

12115399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 31.

The square root of 12115399 is about 3480.7181730212. The cubic root of 12115399 is about 229.6743911781.

The spelling of 12115399 in words is "twelve million, one hundred fifteen thousand, three hundred ninety-nine".