1244220443 has 4 divisors (see below), whose sum is σ = 1298317008. Its totient is φ = 1190123880.

The previous prime is 1244220427. The next prime is 1244220449. The reversal of 1244220443 is 3440224421.

It is a happy number.

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 1244220443 - 2⁴ = 1244220427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244220449) 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, 27048248 + ... + 27048293.

It is an arithmetic number, because the mean of its divisors is an integer number (324579252).

Almost surely, 2^1244220443 is an apocalyptic number.

1244220443 is a deficient number, since it is larger than the sum of its proper divisors (54096565).

1244220443 is an equidigital number, since it uses as much as digits as its factorization.

1244220443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54096564.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 1244220443 is about 35273.5090825962. The cubic root of 1244220443 is about 1075.5545559150.

Adding to 1244220443 its reverse (3440224421), we get a palindrome (4684444864).

The spelling of 1244220443 in words is "one billion, two hundred forty-four million, two hundred twenty thousand, four hundred forty-three".