1045221444 has 18 divisors (see below), whose sum is σ = 2642087630. Its totient is φ = 348407136.

The previous prime is 1045221413. The next prime is 1045221469. The reversal of 1045221444 is 4441225401.

It can be written as a sum of positive squares in only one way, i.e., 768398400 + 276823044 = 27720^2 + 16638^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 14516929 + ... + 14517000.

Almost surely, 2^1045221444 is an apocalyptic number.

It is an amenable number.

1045221444 is an abundant number, since it is smaller than the sum of its proper divisors (1596866186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1045221444 is a wasteful number, since it uses less digits than its factorization.

1045221444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29033939 (or 29033934 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 1045221444 is about 32329.8846889376. The cubic root of 1045221444 is about 1014.8521366461.

Adding to 1045221444 its reverse (4441225401), we get a palindrome (5486446845).

The spelling of 1045221444 in words is "one billion, forty-five million, two hundred twenty-one thousand, four hundred forty-four".