2091171 has 8 divisors (see below), whose sum is σ = 2847744. Its totient is φ = 1364360.

The previous prime is 2091151. The next prime is 2091191. The reversal of 2091171 is 1711902.

It is an interprime number because it is at equal distance from previous prime (2091151) and next prime (2091191).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091171 - 2⁵ = 2091139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2091151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7275 + ... + 7556.

It is an arithmetic number, because the mean of its divisors is an integer number (355968).

2^2091171 is an apocalyptic number.

2091171 is a deficient number, since it is larger than the sum of its proper divisors (756573).

2091171 is a wasteful number, since it uses less digits than its factorization.

2091171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14881.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 2091171 is about 1446.0881715857. The cubic root of 2091171 is about 127.8782003807.

The spelling of 2091171 in words is "two million, ninety-one thousand, one hundred seventy-one".