12127289 has 2 divisors, whose sum is σ = 12127290. Its totient is φ = 12127288.

The previous prime is 12127261. The next prime is 12127309. The reversal of 12127289 is 98272121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10291264 + 1836025 = 3208^2 + 1355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12127289 is a prime.

It is a super-3 number, since 3×12127289³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12127589) 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, 6063644 + 6063645.

It is an arithmetic number, because the mean of its divisors is an integer number (6063645).

Almost surely, 2^12127289 is an apocalyptic number.

It is an amenable number.

12127289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12127289 is an equidigital number, since it uses as much as digits as its factorization.

12127289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 12127289 is about 3482.4257350301. The cubic root of 12127289 is about 229.7495004297.

The spelling of 12127289 in words is "twelve million, one hundred twenty-seven thousand, two hundred eighty-nine".