1244162243 has 4 divisors (see below), whose sum is σ = 1244242488. Its totient is φ = 1244082000.

The previous prime is 1244162201. The next prime is 1244162251. The reversal of 1244162243 is 3422614421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3422614421 = 3413 ⋅1002817.

It is a cyclic number.

It is not a de Polignac number, because 1244162243 - 2²⁰ = 1243113667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244162273) 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, 8621 + ... + 50622.

It is an arithmetic number, because the mean of its divisors is an integer number (311060622).

Almost surely, 2^1244162243 is an apocalyptic number.

1244162243 is a deficient number, since it is larger than the sum of its proper divisors (80245).

1244162243 is an equidigital number, since it uses as much as digits as its factorization.

1244162243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80244.

The product of its digits is 9216, while the sum is 29.

The square root of 1244162243 is about 35272.6840912341. The cubic root of 1244162243 is about 1075.5377855076.

Adding to 1244162243 its reverse (3422614421), we get a palindrome (4666776664).

The spelling of 1244162243 in words is "one billion, two hundred forty-four million, one hundred sixty-two thousand, two hundred forty-three".