12128269 has 2 divisors, whose sum is σ = 12128270. Its totient is φ = 12128268.

The previous prime is 12128261. The next prime is 12128329. The reversal of 12128269 is 96282121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8779369 + 3348900 = 2963^2 + 1830^2 .

It is a cyclic number.

It is not a de Polignac number, because 12128269 - 2³ = 12128261 is a prime.

It is a super-2 number, since 2×12128269² = 294189817872722, which contains 22 as substring.

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 12128269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12128261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064134 + 6064135.

It is an arithmetic number, because the mean of its divisors is an integer number (6064135).

Almost surely, 2^12128269 is an apocalyptic number.

It is an amenable number.

12128269 is a deficient number, since it is larger than the sum of its proper divisors (1).

12128269 is an equidigital number, since it uses as much as digits as its factorization.

12128269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 12128269 is about 3482.5664387058. The cubic root of 12128269 is about 229.7556889094.

The spelling of 12128269 in words is "twelve million, one hundred twenty-eight thousand, two hundred sixty-nine".