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12171 = 34057

12171 has 4 divisors (see below), whose sum is σ = 16232. Its totient is φ = 8112.

The previous prime is 12163. The next prime is 12197. The reversal of 12171 is 17121.

12171 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12171 - 23 = 12163 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12101) 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, 2026 + ... + 2031.

It is an arithmetic number, because the mean of its divisors is an integer number (4058).

212171 is an apocalyptic number.

12171 is a deficient number, since it is larger than the sum of its proper divisors (4061).

12171 is an equidigital number, since it uses as much as digits as its factorization.

12171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060.

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

The square root of 12171 is about 110.3222552344. The cubic root of 12171 is about 23.0025202027.

Adding to 12171 its reverse (17121), we get a palindrome (29292).

Subtracting 12171 from its reverse (17121), we obtain a triangular number (4950 = T99).

The spelling of 12171 in words is "twelve thousand, one hundred seventy-one", and thus it is an iban number.

Divisors: 1 3 4057 12171