It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a self number, because there is not a number n which added to its sum of digits gives 12135.
It is a congruent number.
It is an unprimeable number.
212135 is an apocalyptic number.
12135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
12135 is an equidigital number, since it uses as much as digits as its factorization.
12135 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 817.
The square root of 12135 is about 110.1589760301. The cubic root of 12135 is about 22.9798184656.
Adding to 12135 its reverse (53121), we get a palindrome (65256).
The spelling of 12135 in words is "twelve thousand, one hundred thirty-five".