1243322441 has 4 divisors (see below), whose sum is σ = 1252813584. Its totient is φ = 1233831300.

The previous prime is 1243322419. The next prime is 1243322453. The reversal of 1243322441 is 1442233421.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243322441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243322441.

It is not an unprimeable number, because it can be changed into a prime (1243322401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4745375 + ... + 4745636.

It is an arithmetic number, because the mean of its divisors is an integer number (313203396).

Almost surely, 2^1243322441 is an apocalyptic number.

It is an amenable number.

1243322441 is a deficient number, since it is larger than the sum of its proper divisors (9491143).

1243322441 is an equidigital number, since it uses as much as digits as its factorization.

1243322441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491142.

The product of its digits is 4608, while the sum is 26.

The square root of 1243322441 is about 35260.7776573348. Note that the first 3 decimals coincide. The cubic root of 1243322441 is about 1075.2957372025.

Adding to 1243322441 its reverse (1442233421), we get a palindrome (2685555862).

The spelling of 1243322441 in words is "one billion, two hundred forty-three million, three hundred twenty-two thousand, four hundred forty-one".