12555 has 20 divisors (see below), whose sum is σ = 23232. Its totient is φ = 6480.

The previous prime is 12553. The next prime is 12569. The reversal of 12555 is 55521.

It is not a de Polignac number, because 12555 - 2¹ = 12553 is a prime.

It is a plaindrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 12555.

It is not an unprimeable number, because it can be changed into a prime (12553) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 390 + ... + 420.

2¹²⁵⁵⁵ is an apocalyptic number.

12555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12555 is a deficient number, since it is larger than the sum of its proper divisors (10677).

12555 is an equidigital number, since it uses as much as digits as its factorization.

12555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48 (or 39 counting only the distinct ones).

The product of its digits is 250, while the sum is 18.

The square root of 12555 is about 112.0490963819. The cubic root of 12555 is about 23.2419326850.

It can be divided in two parts, 1 and 2555, that added together give a triangular number (2556 = T₇₁).

The spelling of 12555 in words is "twelve thousand, five hundred fifty-five".