1320004445 has 8 divisors (see below), whose sum is σ = 1586349144. Its totient is φ = 1054441024.

The previous prime is 1320004429. The next prime is 1320004507. The reversal of 1320004445 is 5444000231.

It can be written as a sum of positive squares in 4 ways, for example, as 115498009 + 1204506436 = 10747^2 + 34706^2 .

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 1320004445 - 2⁴ = 1320004429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320004445.

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 7 ways as a sum of consecutive naturals, for example, 191594 + ... + 198363.

It is an arithmetic number, because the mean of its divisors is an integer number (198293643).

Almost surely, 2^1320004445 is an apocalyptic number.

It is an amenable number.

1320004445 is a deficient number, since it is larger than the sum of its proper divisors (266344699).

1320004445 is an equidigital number, since it uses as much as digits as its factorization.

1320004445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390639.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1320004445 is about 36331.8654214176. The cubic root of 1320004445 is about 1096.9625417965.

Adding to 1320004445 its reverse (5444000231), we get a palindrome (6764004676).

The spelling of 1320004445 in words is "one billion, three hundred twenty million, four thousand, four hundred forty-five".