1244439145 has 8 divisors (see below), whose sum is σ = 1494422856. Its totient is φ = 994820736.

The previous prime is 1244439139. The next prime is 1244439149. The reversal of 1244439145 is 5419344421.

It can be written as a sum of positive squares in 4 ways, for example, as 262180864 + 982258281 = 16192^2 + 31341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1244439145 - 2¹⁵ = 1244406377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244439149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83772 + ... + 97501.

It is an arithmetic number, because the mean of its divisors is an integer number (186802857).

Almost surely, 2^1244439145 is an apocalyptic number.

It is an amenable number.

1244439145 is a deficient number, since it is larger than the sum of its proper divisors (249983711).

1244439145 is a wasteful number, since it uses less digits than its factorization.

1244439145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182651.

The product of its digits is 69120, while the sum is 37.

The square root of 1244439145 is about 35276.6090348832. The cubic root of 1244439145 is about 1075.6175705126.

The spelling of 1244439145 in words is "one billion, two hundred forty-four million, four hundred thirty-nine thousand, one hundred forty-five".