12534242243 has 4 divisors (see below), whose sum is σ = 12562158600. Its totient is φ = 12506325888.

The previous prime is 12534242209. The next prime is 12534242263. The reversal of 12534242243 is 34224243521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12534242243 - 2¹² = 12534238147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12534242263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13957505 + ... + 13958402.

It is an arithmetic number, because the mean of its divisors is an integer number (3140539650).

Almost surely, 2^12534242243 is an apocalyptic number.

12534242243 is a deficient number, since it is larger than the sum of its proper divisors (27916357).

12534242243 is an equidigital number, since it uses as much as digits as its factorization.

12534242243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27916356.

The product of its digits is 46080, while the sum is 32.

Adding to 12534242243 its reverse (34224243521), we get a palindrome (46758485764).

The spelling of 12534242243 in words is "twelve billion, five hundred thirty-four million, two hundred forty-two thousand, two hundred forty-three".