985585 has 4 divisors (see below), whose sum is σ = 1182708. Its totient is φ = 788464.

The previous prime is 985571. The next prime is 985597. The reversal of 985585 is 585589.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 585589 = 97 ⋅6037.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 667489 = 564^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 985585 - 2¹⁹ = 461297 is a prime.

It is a Duffinian number.

985585 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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, 98554 + ... + 98563.

It is an arithmetic number, because the mean of its divisors is an integer number (295677).

2⁹⁸⁵⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

985585 is a deficient number, since it is larger than the sum of its proper divisors (197123).

985585 is a wasteful number, since it uses less digits than its factorization.

985585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197122.

The product of its digits is 72000, while the sum is 40.

The square root of 985585 is about 992.7663370602. The cubic root of 985585 is about 99.5171725283.

The spelling of 985585 in words is "nine hundred eighty-five thousand, five hundred eighty-five".