1244004401 has 2 divisors, whose sum is σ = 1244004402. Its totient is φ = 1244004400.

The previous prime is 1244004361. The next prime is 1244004403. The reversal of 1244004401 is 1044004421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664350625 + 579653776 = 25775^2 + 24076^2 .

It is an emirp because it is prime and its reverse (1044004421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1244004401 - 2⁶ = 1244004337 is a prime.

It is a super-4 number, since 4×1244004401⁴ (a number of 37 digits) contains 4444 as substring.

Together with 1244004403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1244004403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622002200 + 622002201.

It is an arithmetic number, because the mean of its divisors is an integer number (622002201).

Almost surely, 2^1244004401 is an apocalyptic number.

It is an amenable number.

1244004401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244004401 is an equidigital number, since it uses as much as digits as its factorization.

1244004401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1244004401 is about 35270.4465664953. The cubic root of 1244004401 is about 1075.4923004926.

Adding to 1244004401 its sum of digits (20), we get a palindrome (1244004421).

Adding to 1244004401 its reverse (1044004421), we get a palindrome (2288008822).

The spelling of 1244004401 in words is "one billion, two hundred forty-four million, four thousand, four hundred one".