2002171 has 4 divisors (see below), whose sum is σ = 2029672. Its totient is φ = 1974672.

The previous prime is 2002159. The next prime is 2002199. The reversal of 2002171 is 1712002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2002171 - 2¹⁵ = 1969403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002151) 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, 13641 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (507418).

2^2002171 is an apocalyptic number.

2002171 is a deficient number, since it is larger than the sum of its proper divisors (27501).

2002171 is an equidigital number, since it uses as much as digits as its factorization.

2002171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27500.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 2002171 is about 1414.9809185993. The cubic root of 2002171 is about 126.0376766474.

Adding to 2002171 its reverse (1712002), we get a palindrome (3714173).

The spelling of 2002171 in words is "two million, two thousand, one hundred seventy-one".