2001187 has 4 divisors (see below), whose sum is σ = 2020720. Its totient is φ = 1981656.

The previous prime is 2001179. The next prime is 2001191. The reversal of 2001187 is 7811002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7811002 = 2 ⋅3905501.

It is a cyclic number.

It is not a de Polignac number, because 2001187 - 2³ = 2001179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9612 + ... + 9817.

It is an arithmetic number, because the mean of its divisors is an integer number (505180).

2^2001187 is an apocalyptic number.

2001187 is a deficient number, since it is larger than the sum of its proper divisors (19533).

2001187 is a wasteful number, since it uses less digits than its factorization.

2001187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19532.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 2001187 is about 1414.6331679980. The cubic root of 2001187 is about 126.0170254981.

Adding to 2001187 its reverse (7811002), we get a palindrome (9812189).

The spelling of 2001187 in words is "two million, one thousand, one hundred eighty-seven".