12340543 has 2 divisors, whose sum is σ = 12340544. Its totient is φ = 12340542.

The previous prime is 12340541. The next prime is 12340547. The reversal of 12340543 is 34504321.

12340543 is nontrivially palindromic in base 11.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12340543 - 2¹ = 12340541 is a prime.

Together with 12340541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170271 + 6170272.

It is an arithmetic number, because the mean of its divisors is an integer number (6170272).

Almost surely, 2^12340543 is an apocalyptic number.

12340543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340543 is an equidigital number, since it uses as much as digits as its factorization.

12340543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 12340543 is about 3512.9109012328. The cubic root of 12340543 is about 231.0883703295.

Adding to 12340543 its reverse (34504321), we get a palindrome (46844864).

The spelling of 12340543 in words is "twelve million, three hundred forty thousand, five hundred forty-three".