1330665 has 64 divisors (see below), whose sum is σ = 2764800. Its totient is φ = 532224.

The previous prime is 1330649. The next prime is 1330691. The reversal of 1330665 is 5660331.

It is not a de Polignac number, because 1330665 - 2⁴ = 1330649 is a prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 45871 + ... + 45899.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2^1330665 is an apocalyptic number.

1330665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1330665 is an abundant number, since it is smaller than the sum of its proper divisors (1434135).

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

1330665 is a wasteful number, since it uses less digits than its factorization.

1330665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 1330665 is about 1153.5445375017. The cubic root of 1330665 is about 109.9907705755.

Adding to 1330665 its reverse (5660331), we get a palindrome (6990996).

The spelling of 1330665 in words is "one million, three hundred thirty thousand, six hundred sixty-five".