12420043 has 2 divisors, whose sum is σ = 12420044. Its totient is φ = 12420042.

The previous prime is 12420041. The next prime is 12420059. The reversal of 12420043 is 34002421.

It is an a-pointer prime, because the next prime (12420059) can be obtained adding 12420043 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12420043 - 2¹ = 12420041 is a prime.

Together with 12420041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12419999 and 12420026.

It is not a weakly prime, because it can be changed into another prime (12420041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210021 + 6210022.

It is an arithmetic number, because the mean of its divisors is an integer number (6210022).

Almost surely, 2^12420043 is an apocalyptic number.

12420043 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420043 is an equidigital number, since it uses as much as digits as its factorization.

12420043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 12420043 is about 3524.2081380077. The cubic root of 12420043 is about 231.5835461398.

Adding to 12420043 its reverse (34002421), we get a palindrome (46422464).

The spelling of 12420043 in words is "twelve million, four hundred twenty thousand, forty-three".