12129617 has 2 divisors, whose sum is σ = 12129618. Its totient is φ = 12129616.

The previous prime is 12129583. The next prime is 12129659. The reversal of 12129617 is 71692121.

12129617 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11999296 + 130321 = 3464^2 + 361^2 .

It is an emirp because it is prime and its reverse (71692121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12129617 - 2¹² = 12125521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12129617.

It is not a weakly prime, because it can be changed into another prime (12129697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064808 + 6064809.

It is an arithmetic number, because the mean of its divisors is an integer number (6064809).

Almost surely, 2^12129617 is an apocalyptic number.

It is an amenable number.

12129617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129617 is an equidigital number, since it uses as much as digits as its factorization.

12129617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 12129617 is about 3482.7599687604. The cubic root of 12129617 is about 229.7642006818.

The spelling of 12129617 in words is "twelve million, one hundred twenty-nine thousand, six hundred seventeen".