2001685 has 8 divisors (see below), whose sum is σ = 2745216. Its totient is φ = 1372560.

The previous prime is 2001677. The next prime is 2001691. The reversal of 2001685 is 5861002.

It is a happy number.

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

It is not a de Polignac number, because 2001685 - 2³ = 2001677 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 28561 + ... + 28630.

It is an arithmetic number, because the mean of its divisors is an integer number (343152).

2^2001685 is an apocalyptic number.

It is an amenable number.

2001685 is a deficient number, since it is larger than the sum of its proper divisors (743531).

2001685 is an equidigital number, since it uses as much as digits as its factorization.

2001685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57203.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2001685 is about 1414.8091744119. The cubic root of 2001685 is about 126.0274778403.

Adding to 2001685 its reverse (5861002), we get a palindrome (7862687).

The spelling of 2001685 in words is "two million, one thousand, six hundred eighty-five".