12543042441 has 4 divisors (see below), whose sum is σ = 16724056592. Its totient is φ = 8362028292.

The previous prime is 12543042403. The next prime is 12543042443. The reversal of 12543042441 is 14424034521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12543042441 - 2⁷ = 12543042313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12543042399 and 12543042408.

It is not an unprimeable number, because it can be changed into a prime (12543042443) 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, 2090507071 + ... + 2090507076.

It is an arithmetic number, because the mean of its divisors is an integer number (4181014148).

Almost surely, 2^12543042441 is an apocalyptic number.

It is an amenable number.

12543042441 is a deficient number, since it is larger than the sum of its proper divisors (4181014151).

12543042441 is an equidigital number, since it uses as much as digits as its factorization.

12543042441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181014150.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 12543042441 its reverse (14424034521), we get a palindrome (26967076962).

The spelling of 12543042441 in words is "twelve billion, five hundred forty-three million, forty-two thousand, four hundred forty-one".