2001995 has 8 divisors (see below), whose sum is σ = 2410560. Its totient is φ = 1596160.

The previous prime is 2001977. The next prime is 2001997. The reversal of 2001995 is 5991002.

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 2001995 - 2¹² = 1997899 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2001997) 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, 1691 + ... + 2619.

It is an arithmetic number, because the mean of its divisors is an integer number (301320).

2^2001995 is an apocalyptic number.

2001995 is a deficient number, since it is larger than the sum of its proper divisors (408565).

2001995 is an equidigital number, since it uses as much as digits as its factorization.

2001995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 2001995 is about 1414.9187255811. The cubic root of 2001995 is about 126.0339834429.

Adding to 2001995 its reverse (5991002), we get a palindrome (7992997).

The spelling of 2001995 in words is "two million, one thousand, nine hundred ninety-five".