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12186 = 232677

12186 has 12 divisors (see below), whose sum is σ = 26442. Its totient is φ = 4056.

The previous prime is 12163. The next prime is 12197. The reversal of 12186 is 68121.

It can be written as a sum of positive squares in only one way, i.e., 6561 + 5625 = 81^2 + 75^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 677 = 12186 / (1 + 2 + 1 + 8 + 6).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321 + ... + 356.

212186 is an apocalyptic number.

12186 is an abundant number, since it is smaller than the sum of its proper divisors (14256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12186 is a wasteful number, since it uses less digits than its factorization.

12186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 682 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 12186 is about 110.3902169578. The cubic root of 12186 is about 23.0119660482.

Subtracting from 12186 its product of digits (96), we obtain a triangular number (12090 = T155).

It can be divided in two parts, 1 and 2186, that added together give a 7-th power (2187 = 37).

The spelling of 12186 in words is "twelve thousand, one hundred eighty-six".

Divisors: 1 2 3 6 9 18 677 1354 2031 4062 6093 12186