12122543 has 2 divisors, whose sum is σ = 12122544. Its totient is φ = 12122542.

The previous prime is 12122533. The next prime is 12122549. The reversal of 12122543 is 34522121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12122543 - 2²⁰ = 11073967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061271 + 6061272.

It is an arithmetic number, because the mean of its divisors is an integer number (6061272).

Almost surely, 2^12122543 is an apocalyptic number.

12122543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122543 is an equidigital number, since it uses as much as digits as its factorization.

12122543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 20.

The square root of 12122543 is about 3481.7442467821. The cubic root of 12122543 is about 229.7195257887.

Adding to 12122543 its reverse (34522121), we get a palindrome (46644664).

The spelling of 12122543 in words is "twelve million, one hundred twenty-two thousand, five hundred forty-three".