12187 has 4 divisors (see below), whose sum is σ = 13936. Its totient is φ = 10440.

The previous prime is 12163. The next prime is 12197. The reversal of 12187 is 78121.

12187 is nontrivially palindromic in base 6.

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 12187 - 2¹¹ = 10139 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12107) 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, 864 + ... + 877.

It is an arithmetic number, because the mean of its divisors is an integer number (3484).

2¹²¹⁸⁷ is an apocalyptic number.

12187 is a deficient number, since it is larger than the sum of its proper divisors (1749).

12187 is an equidigital number, since it uses as much as digits as its factorization.

12187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748.

The product of its digits is 112, while the sum is 19.

The square root of 12187 is about 110.3947462518. The cubic root of 12187 is about 23.0125954955.

It can be divided in two parts, 1218 and 7, that added together give a triangular number (1225 = T₄₉).

The spelling of 12187 in words is "twelve thousand, one hundred eighty-seven".