985785 has 8 divisors (see below), whose sum is σ = 1577280. Its totient is φ = 525744.

The previous prime is 985783. The next prime is 985799. The reversal of 985785 is 587589.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 985785 - 2¹ = 985783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985781) 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 7 ways as a sum of consecutive naturals, for example, 32845 + ... + 32874.

It is an arithmetic number, because the mean of its divisors is an integer number (197160).

2⁹⁸⁵⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

985785 is a deficient number, since it is larger than the sum of its proper divisors (591495).

985785 is a wasteful number, since it uses less digits than its factorization.

985785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65727.

The product of its digits is 100800, while the sum is 42.

The square root of 985785 is about 992.8670605877. The cubic root of 985785 is about 99.5239035859.

It can be divided in two parts, 985 and 785, that added together give a triangular number (1770 = T₅₉).

The spelling of 985785 in words is "nine hundred eighty-five thousand, seven hundred eighty-five".