1665089 has 4 divisors (see below), whose sum is σ = 1703856. Its totient is φ = 1626324.

The previous prime is 1665073. The next prime is 1665091. The reversal of 1665089 is 9805661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1665089 - 2⁴ = 1665073 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 (1665029) 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, 19319 + ... + 19404.

It is an arithmetic number, because the mean of its divisors is an integer number (425964).

2^1665089 is an apocalyptic number.

It is an amenable number.

1665089 is a deficient number, since it is larger than the sum of its proper divisors (38767).

1665089 is an equidigital number, since it uses as much as digits as its factorization.

1665089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38766.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1665089 is about 1290.3832763950. The cubic root of 1665089 is about 118.5256877258.

The spelling of 1665089 in words is "one million, six hundred sixty-five thousand, eighty-nine".