1243131443 has 8 divisors (see below), whose sum is σ = 1326306960. Its totient is φ = 1161072640.

The previous prime is 1243131437. The next prime is 1243131473. The reversal of 1243131443 is 3441313421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243131443 - 2⁴ = 1243131427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243131433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276878 + ... + 281331.

It is an arithmetic number, because the mean of its divisors is an integer number (165788370).

Almost surely, 2^1243131443 is an apocalyptic number.

1243131443 is a deficient number, since it is larger than the sum of its proper divisors (83175517).

1243131443 is a wasteful number, since it uses less digits than its factorization.

1243131443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558357.

The product of its digits is 3456, while the sum is 26.

The square root of 1243131443 is about 35258.0691899032. The cubic root of 1243131443 is about 1075.2406724164.

Adding to 1243131443 its reverse (3441313421), we get a palindrome (4684444864).

The spelling of 1243131443 in words is "one billion, two hundred forty-three million, one hundred thirty-one thousand, four hundred forty-three".