12242543 has 4 divisors (see below), whose sum is σ = 12261408. Its totient is φ = 12223680.

The previous prime is 12242539. The next prime is 12242557. The reversal of 12242543 is 34524221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34524221 = 751 ⋅45971.

It is a cyclic number.

It is not a de Polignac number, because 12242543 - 2² = 12242539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12242563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8423 + ... + 9768.

It is an arithmetic number, because the mean of its divisors is an integer number (3065352).

Almost surely, 2^12242543 is an apocalyptic number.

12242543 is a deficient number, since it is larger than the sum of its proper divisors (18865).

12242543 is an equidigital number, since it uses as much as digits as its factorization.

12242543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18864.

The product of its digits is 1920, while the sum is 23.

The square root of 12242543 is about 3498.9345521173. The cubic root of 12242543 is about 230.4750295663.

Adding to 12242543 its reverse (34524221), we get a palindrome (46766764).

The spelling of 12242543 in words is "twelve million, two hundred forty-two thousand, five hundred forty-three".