2006001 has 12 divisors (see below), whose sum is σ = 3050320. Its totient is φ = 1266840.

The previous prime is 2005981. The next prime is 2006009. The reversal of 2006001 is 1006002.

It is not a de Polignac number, because 2006001 - 2⁶ = 2005937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2006009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5695 + ... + 6036.

2^2006001 is an apocalyptic number.

It is an amenable number.

2006001 is a deficient number, since it is larger than the sum of its proper divisors (1044319).

2006001 is a wasteful number, since it uses less digits than its factorization.

2006001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11756 (or 11753 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2006001 is about 1416.3336471326. Note that the first 3 decimals coincide. The cubic root of 2006001 is about 126.1179922687.

Subtracting from 2006001 its reverse (1006002), we obtain a palindrome (999999).

The spelling of 2006001 in words is "two million, six thousand, one".