2100171 has 4 divisors (see below), whose sum is σ = 2800232. Its totient is φ = 1400112.

The previous prime is 2100167. The next prime is 2100173. The reversal of 2100171 is 1710012.

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

It is not a de Polignac number, because 2100171 - 2² = 2100167 is a prime.

It is a D-number.

It is a Duffinian number.

2100171 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2100173) 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, 350026 + ... + 350031.

It is an arithmetic number, because the mean of its divisors is an integer number (700058).

2^2100171 is an apocalyptic number.

2100171 is a deficient number, since it is larger than the sum of its proper divisors (700061).

2100171 is an equidigital number, since it uses as much as digits as its factorization.

2100171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700060.

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 2100171 is about 1449.1966740232. The cubic root of 2100171 is about 128.0613922621.

Adding to 2100171 its reverse (1710012), we get a palindrome (3810183).

The spelling of 2100171 in words is "two million, one hundred thousand, one hundred seventy-one".