1090585 has 4 divisors (see below), whose sum is σ = 1308708. Its totient is φ = 872464.

The previous prime is 1090577. The next prime is 1090589. The reversal of 1090585 is 5850901.

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 811801 + 278784 = 901^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090585 - 2³ = 1090577 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109054 + ... + 109063.

It is an arithmetic number, because the mean of its divisors is an integer number (327177).

2^1090585 is an apocalyptic number.

It is an amenable number.

1090585 is a deficient number, since it is larger than the sum of its proper divisors (218123).

1090585 is an equidigital number, since it uses as much as digits as its factorization.

1090585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218122.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1090585 is about 1044.3107774987. The cubic root of 1090585 is about 102.9326546287.

The spelling of 1090585 in words is "one million, ninety thousand, five hundred eighty-five".