12117569 has 2 divisors, whose sum is σ = 12117570. Its totient is φ = 12117568.

The previous prime is 12117551. The next prime is 12117571. The reversal of 12117569 is 96571121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11458225 + 659344 = 3385^2 + 812^2 .

It is a cyclic number.

It is not a de Polignac number, because 12117569 - 2¹² = 12113473 is a prime.

It is a super-2 number, since 2×12117569² = 293670956939522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12117571, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12116569) 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, 6058784 + 6058785.

It is an arithmetic number, because the mean of its divisors is an integer number (6058785).

Almost surely, 2^12117569 is an apocalyptic number.

It is an amenable number.

12117569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117569 is an equidigital number, since it uses as much as digits as its factorization.

12117569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 32.

The square root of 12117569 is about 3481.0298763441. The cubic root of 12117569 is about 229.6881027550.

The spelling of 12117569 in words is "twelve million, one hundred seventeen thousand, five hundred sixty-nine".