12555

12555 is a natural number that follows 12554 and precedes 12556. It is an odd, composite integer with a straightforward prime factorization: 12555 = 3^4 × 5 × 31. This shows the number is divisible by 81, as 12555 ÷ 81 = 155, and also by 5 and by 31.

Because its prime factorization includes multiple primes, 12555 has a total of 20 positive divisors. Representative divisors include 1, 3, 5, 9, 15, 27, 31, 45, 81, 93, 135, 279, 405, 465, 837, 1395, 2511, 4185, 155, and 12555. The last one is the number itself, confirming its status as a composite number.

In terms of divisibility by small primes, 12555 is divisible by 3 (since the sum of its digits is 18) and by 9 and 27 as well, reflecting the 3^4 component in its factorization. The digital root of 12555 is 9, a consequence of the digit sum being 18 and then reducing to 9.

12555 is not a prime number, nor is it a perfect square, given its factorization includes two primes (5 and 31) with odd exponents in addition to the 3^4 term. It can be represented in several product forms, such as 12555 = 81 × 155 = 27 × 465 = 5 × 2511.

In summary, 12555 is a composite, highly factorable number with 20 divisors, divisible by 81, 9, and 5, and it has a digital root of 9.