2001985 has 8 divisors (see below), whose sum is σ = 2411136. Its totient is φ = 1595760.

The previous prime is 2001977. The next prime is 2001997. The reversal of 2001985 is 5891002.

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

It is not a de Polignac number, because 2001985 - 2³ = 2001977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290 + ... + 2380.

It is an arithmetic number, because the mean of its divisors is an integer number (301392).

2^2001985 is an apocalyptic number.

It is an amenable number.

2001985 is a deficient number, since it is larger than the sum of its proper divisors (409151).

2001985 is a wasteful number, since it uses less digits than its factorization.

2001985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2001985 is about 1414.9151918048. The cubic root of 2001985 is about 126.0337735952.

Adding to 2001985 its reverse (5891002), we get a palindrome (7892987).

The spelling of 2001985 in words is "two million, one thousand, nine hundred eighty-five".