1244444405 has 4 divisors (see below), whose sum is σ = 1493333292. Its totient is φ = 995555520.

The previous prime is 1244444393. The next prime is 1244444407. The reversal of 1244444405 is 5044444421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5044444421 = 223 ⋅22620827.

It can be written as a sum of positive squares in 2 ways, for example, as 597606916 + 646837489 = 24446^2 + 25433^2 .

It is not a de Polignac number, because 1244444405 - 2¹⁴ = 1244428021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244444407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124444436 + ... + 124444445.

It is an arithmetic number, because the mean of its divisors is an integer number (373333323).

Almost surely, 2^1244444405 is an apocalyptic number.

It is an amenable number.

1244444405 is a deficient number, since it is larger than the sum of its proper divisors (248888887).

1244444405 is an equidigital number, since it uses as much as digits as its factorization.

1244444405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248888886.

The product of its (nonzero) digits is 40960, while the sum is 32.

The square root of 1244444405 is about 35276.6835884554. The cubic root of 1244444405 is about 1075.6190859853.

Adding to 1244444405 its reverse (5044444421), we get a palindrome (6288888826).

The spelling of 1244444405 in words is "one billion, two hundred forty-four million, four hundred forty-four thousand, four hundred five".