12420229 has 2 divisors, whose sum is σ = 12420230. Its totient is φ = 12420228.

The previous prime is 12420227. The next prime is 12420257. The reversal of 12420229 is 92202421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 4524129 = 2810^2 + 2127^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420229 - 2¹ = 12420227 is a prime.

Together with 12420227, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12420227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210114 + 6210115.

It is an arithmetic number, because the mean of its divisors is an integer number (6210115).

Almost surely, 2^12420229 is an apocalyptic number.

It is an amenable number.

12420229 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420229 is an equidigital number, since it uses as much as digits as its factorization.

12420229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12420229 is about 3524.2345268157. The cubic root of 12420229 is about 231.5847021832.

The spelling of 12420229 in words is "twelve million, four hundred twenty thousand, two hundred twenty-nine".