12118543 has 2 divisors, whose sum is σ = 12118544. Its totient is φ = 12118542.

The previous prime is 12118537. The next prime is 12118553. The reversal of 12118543 is 34581121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12118543 - 2¹⁷ = 11987471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12118553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6059271 + 6059272.

It is an arithmetic number, because the mean of its divisors is an integer number (6059272).

Almost surely, 2^12118543 is an apocalyptic number.

12118543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12118543 is an equidigital number, since it uses as much as digits as its factorization.

12118543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 12118543 is about 3481.1697746591. The cubic root of 12118543 is about 229.6942566356.

Adding to 12118543 its reverse (34581121), we get a palindrome (46699664).

The spelling of 12118543 in words is "twelve million, one hundred eighteen thousand, five hundred forty-three".