1330645 has 4 divisors (see below), whose sum is σ = 1596780. Its totient is φ = 1064512.

The previous prime is 1330633. The next prime is 1330649. The reversal of 1330645 is 5460331.

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 762129 + 568516 = 873^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330645 - 2¹⁷ = 1199573 is a prime.

It is a super-2 number, since 2×1330645² = 3541232232050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133060 + ... + 133069.

It is an arithmetic number, because the mean of its divisors is an integer number (399195).

2^1330645 is an apocalyptic number.

It is an amenable number.

1330645 is a deficient number, since it is larger than the sum of its proper divisors (266135).

1330645 is an equidigital number, since it uses as much as digits as its factorization.

1330645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266134.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1330645 is about 1153.5358685364. The cubic root of 1330645 is about 109.9902195161.

Adding to 1330645 its reverse (5460331), we get a palindrome (6790976).

The spelling of 1330645 in words is "one million, three hundred thirty thousand, six hundred forty-five".