12278443 has 2 divisors, whose sum is σ = 12278444. Its totient is φ = 12278442.

The previous prime is 12278429. The next prime is 12278447. The reversal of 12278443 is 34487221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12278443 is a prime.

It is not a weakly prime, because it can be changed into another prime (12278447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6139221 + 6139222.

It is an arithmetic number, because the mean of its divisors is an integer number (6139222).

Almost surely, 2^12278443 is an apocalyptic number.

12278443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12278443 is an equidigital number, since it uses as much as digits as its factorization.

12278443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 31.

The square root of 12278443 is about 3504.0609298356. The cubic root of 12278443 is about 230.7000911707.

It can be divided in two parts, 12278 and 443, that added together give a palindrome (12721).

The spelling of 12278443 in words is "twelve million, two hundred seventy-eight thousand, four hundred forty-three".