1999085 has 16 divisors (see below), whose sum is σ = 2756160. Its totient is φ = 1376640.

The previous prime is 1999069. The next prime is 1999099. The reversal of 1999085 is 5809991.

It is not a de Polignac number, because 1999085 - 2⁴ = 1999069 is a prime.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 89 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (172260).

2^1999085 is an apocalyptic number.

It is an amenable number.

1999085 is a deficient number, since it is larger than the sum of its proper divisors (757075).

1999085 is a wasteful number, since it uses less digits than its factorization.

1999085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 1999085 is about 1413.8900240118. The cubic root of 1999085 is about 125.9728882626.

The spelling of 1999085 in words is "one million, nine hundred ninety-nine thousand, eighty-five".