It is a nialpdrome in base 11.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 12642.
212642 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15048).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12642 is a wasteful number, since it uses less digits than its factorization.
12642 is an evil number, because the sum of its binary digits is even.
The square root of 12642 is about 112.4366488295. The cubic root of 12642 is about 23.2954942260.
The spelling of 12642 in words is "twelve thousand, six hundred forty-two".