1321044445 has 32 divisors (see below), whose sum is σ = 1990010880. Its totient is φ = 820860480.

The previous prime is 1321044391. The next prime is 1321044481. The reversal of 1321044445 is 5444401231.

It is not a de Polignac number, because 1321044445 - 2²³ = 1312655837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27891 + ... + 58480.

It is an arithmetic number, because the mean of its divisors is an integer number (62187840).

Almost surely, 2^1321044445 is an apocalyptic number.

It is an amenable number.

1321044445 is a deficient number, since it is larger than the sum of its proper divisors (668966435).

1321044445 is a wasteful number, since it uses less digits than its factorization.

1321044445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86425.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1321044445 is about 36346.1751082559. The cubic root of 1321044445 is about 1097.2505563723.

Adding to 1321044445 its reverse (5444401231), we get a palindrome (6765445676).

The spelling of 1321044445 in words is "one billion, three hundred twenty-one million, forty-four thousand, four hundred forty-five".