12342257 has 2 divisors, whose sum is σ = 12342258. Its totient is φ = 12342256.

The previous prime is 12342223. The next prime is 12342259. The reversal of 12342257 is 75224321.

12342257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11262736 + 1079521 = 3356^2 + 1039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12342257 is a prime.

Together with 12342259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12342259) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6171128 + 6171129.

It is an arithmetic number, because the mean of its divisors is an integer number (6171129).

Almost surely, 2^12342257 is an apocalyptic number.

It is an amenable number.

12342257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12342257 is an equidigital number, since it uses as much as digits as its factorization.

12342257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 26.

The square root of 12342257 is about 3513.1548499888. The cubic root of 12342257 is about 231.0990685927.

Adding to 12342257 its reverse (75224321), we get a palindrome (87566578).

The spelling of 12342257 in words is "twelve million, three hundred forty-two thousand, two hundred fifty-seven".