12266789 has 2 divisors, whose sum is σ = 12266790. Its totient is φ = 12266788.

The previous prime is 12266777. The next prime is 12266791. The reversal of 12266789 is 98766221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6225025 + 6041764 = 2495^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 12266789 - 2¹² = 12262693 is a prime.

It is a super-2 number, since 2×12266789² = 300948224741042, which contains 22 as substring.

Together with 12266791, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12266719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6133394 + 6133395.

It is an arithmetic number, because the mean of its divisors is an integer number (6133395).

Almost surely, 2^12266789 is an apocalyptic number.

It is an amenable number.

12266789 is a deficient number, since it is larger than the sum of its proper divisors (1).

12266789 is an equidigital number, since it uses as much as digits as its factorization.

12266789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 12266789 is about 3502.3976073541. The cubic root of 12266789 is about 230.6270789295.

The spelling of 12266789 in words is "twelve million, two hundred sixty-six thousand, seven hundred eighty-nine".