1330445 has 4 divisors (see below), whose sum is σ = 1596540. Its totient is φ = 1064352.

The previous prime is 1330423. The next prime is 1330453. The reversal of 1330445 is 5440331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 687241 + 643204 = 829^2 + 802^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330445 - 2¹² = 1326349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133040 + ... + 133049.

It is an arithmetic number, because the mean of its divisors is an integer number (399135).

2^1330445 is an apocalyptic number.

It is an amenable number.

1330445 is a deficient number, since it is larger than the sum of its proper divisors (266095).

1330445 is an equidigital number, since it uses as much as digits as its factorization.

1330445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266094.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1330445 is about 1153.4491752999. The cubic root of 1330445 is about 109.9847086182.

Adding to 1330445 its reverse (5440331), we get a palindrome (6770776).

The spelling of 1330445 in words is "one million, three hundred thirty thousand, four hundred forty-five".