1085889 has 24 divisors (see below), whose sum is σ = 1723680. Its totient is φ = 606144.

The previous prime is 1085881. The next prime is 1085891. The reversal of 1085889 is 9885801.

It is not a de Polignac number, because 1085889 - 2³ = 1085881 is a prime.

1085889 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085881) 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 23 ways as a sum of consecutive naturals, for example, 12157 + ... + 12245.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^1085889 is an apocalyptic number.

It is an amenable number.

1085889 is a deficient number, since it is larger than the sum of its proper divisors (637791).

1085889 is an equidigital number, since it uses as much as digits as its factorization.

1085889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 1085889 is about 1042.0599790799. The cubic root of 1085889 is about 102.7847012515.

The spelling of 1085889 in words is "one million, eighty-five thousand, eight hundred eighty-nine".