1080665 has 4 divisors (see below), whose sum is σ = 1296804. Its totient is φ = 864528.

The previous prime is 1080661. The next prime is 1080679. The reversal of 1080665 is 5660801.

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 781456 + 299209 = 884^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 1080665 - 2² = 1080661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1080661) 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, 108062 + ... + 108071.

It is an arithmetic number, because the mean of its divisors is an integer number (324201).

2^1080665 is an apocalyptic number.

It is an amenable number.

1080665 is a deficient number, since it is larger than the sum of its proper divisors (216139).

1080665 is an equidigital number, since it uses as much as digits as its factorization.

1080665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216138.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1080665 is about 1039.5503835794. The cubic root of 1080665 is about 102.6196105171.

The spelling of 1080665 in words is "one million, eighty thousand, six hundred sixty-five".