1099585 has 4 divisors (see below), whose sum is σ = 1319508. Its totient is φ = 879664.

The previous prime is 1099573. The next prime is 1099589. The reversal of 1099585 is 5859901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5859901 = 137 ⋅42773.

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 400689 = 836^2 + 633^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099585 - 2¹³ = 1091393 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099589) 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, 109954 + ... + 109963.

It is an arithmetic number, because the mean of its divisors is an integer number (329877).

2^1099585 is an apocalyptic number.

It is an amenable number.

1099585 is a deficient number, since it is larger than the sum of its proper divisors (219923).

1099585 is an equidigital number, since it uses as much as digits as its factorization.

1099585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219922.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 1099585 is about 1048.6109860191. The cubic root of 1099585 is about 103.2150282083.

The spelling of 1099585 in words is "one million, ninety-nine thousand, five hundred eighty-five".