1244144441 has 4 divisors (see below), whose sum is σ = 1245780084. Its totient is φ = 1242508800.

The previous prime is 1244144401. The next prime is 1244144443. The reversal of 1244144441 is 1444414421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1444414421 = 23 ⋅62800627.

It can be written as a sum of positive squares in 2 ways, for example, as 166926400 + 1077218041 = 12920^2 + 32821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244144441 - 2¹⁴ = 1244128057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244144443) 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, 816680 + ... + 818201.

It is an arithmetic number, because the mean of its divisors is an integer number (311445021).

Almost surely, 2^1244144441 is an apocalyptic number.

It is an amenable number.

1244144441 is a deficient number, since it is larger than the sum of its proper divisors (1635643).

1244144441 is an equidigital number, since it uses as much as digits as its factorization.

1244144441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635642.

The product of its digits is 8192, while the sum is 29.

The square root of 1244144441 is about 35272.4317420844. The cubic root of 1244144441 is about 1075.5326557332.

Adding to 1244144441 its reverse (1444414421), we get a palindrome (2688558862).

The spelling of 1244144441 in words is "one billion, two hundred forty-four million, one hundred forty-four thousand, four hundred forty-one".