1330081 has 4 divisors (see below), whose sum is σ = 1362564. Its totient is φ = 1297600.

The previous prime is 1330073. The next prime is 1330093. The reversal of 1330081 is 1800331.

1330081 = 815² + 816².

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 664225 + 665856 = 815^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330081 - 2³ = 1330073 is a prime.

It is a super-2 number, since 2×1330081² = 3538230933122, which contains 22 as substring.

It is a Duffinian number.

1330081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1330001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16180 + ... + 16261.

It is an arithmetic number, because the mean of its divisors is an integer number (340641).

2^1330081 is an apocalyptic number.

1330081 is the 816-th centered square number.

It is an amenable number.

1330081 is a deficient number, since it is larger than the sum of its proper divisors (32483).

1330081 is an equidigital number, since it uses as much as digits as its factorization.

1330081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32482.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1330081 is about 1153.2913768862. The cubic root of 1330081 is about 109.9746773666.

The spelling of 1330081 in words is "one million, three hundred thirty thousand, eighty-one".