12128243 has 2 divisors, whose sum is σ = 12128244. Its totient is φ = 12128242.

The previous prime is 12128239. The next prime is 12128257. The reversal of 12128243 is 34282121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12128243 - 2² = 12128239 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12128443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064121 + 6064122.

It is an arithmetic number, because the mean of its divisors is an integer number (6064122).

Almost surely, 2^12128243 is an apocalyptic number.

12128243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12128243 is an equidigital number, since it uses as much as digits as its factorization.

12128243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

The square root of 12128243 is about 3482.5627058245. The cubic root of 12128243 is about 229.7555247296.

The spelling of 12128243 in words is "twelve million, one hundred twenty-eight thousand, two hundred forty-three".