12420269 has 2 divisors, whose sum is σ = 12420270. Its totient is φ = 12420268.

The previous prime is 12420263. The next prime is 12420277. The reversal of 12420269 is 96202421.

12420269 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 1857769 = 3250^2 + 1363^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420269 - 2²⁰ = 11371693 is a prime.

It is a super-2 number, since 2×12420269² = 308526164064722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12420263) 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, 6210134 + 6210135.

It is an arithmetic number, because the mean of its divisors is an integer number (6210135).

Almost surely, 2^12420269 is an apocalyptic number.

It is an amenable number.

12420269 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420269 is an equidigital number, since it uses as much as digits as its factorization.

12420269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 12420269 is about 3524.2402018024. The cubic root of 12420269 is about 231.5849507931.

The spelling of 12420269 in words is "twelve million, four hundred twenty thousand, two hundred sixty-nine".