1244403221 has 2 divisors, whose sum is σ = 1244403222. Its totient is φ = 1244403220.

The previous prime is 1244403211. The next prime is 1244403241. The reversal of 1244403221 is 1223044421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1163151025 + 81252196 = 34105^2 + 9014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244403221 - 2¹⁰ = 1244402197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244403211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622201610 + 622201611.

It is an arithmetic number, because the mean of its divisors is an integer number (622201611).

Almost surely, 2^1244403221 is an apocalyptic number.

It is an amenable number.

1244403221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244403221 is an equidigital number, since it uses as much as digits as its factorization.

1244403221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1244403221 is about 35276.0998552845. The cubic root of 1244403221 is about 1075.6072202389.

Adding to 1244403221 its reverse (1223044421), we get a palindrome (2467447642).

The spelling of 1244403221 in words is "one billion, two hundred forty-four million, four hundred three thousand, two hundred twenty-one".