12420347 has 2 divisors, whose sum is σ = 12420348. Its totient is φ = 12420346.

The previous prime is 12420341. The next prime is 12420349. The reversal of 12420347 is 74302421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12420347 - 2¹⁸ = 12158203 is a prime.

Together with 12420349, 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 (12420341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210173 + 6210174.

It is an arithmetic number, because the mean of its divisors is an integer number (6210174).

Almost surely, 2^12420347 is an apocalyptic number.

12420347 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420347 is an equidigital number, since it uses as much as digits as its factorization.

12420347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 12420347 is about 3524.2512680001. The cubic root of 12420347 is about 231.5854355810.

Adding to 12420347 its reverse (74302421), we get a palindrome (86722768).

The spelling of 12420347 in words is "twelve million, four hundred twenty thousand, three hundred forty-seven".