• 252 can be written using four 4's:
252 is nontrivially palindromic in base 5 and base 10.
It is a tau number, because it is divible by the number of its divisors (18).
It is an alternating number because its digits alternate between even and odd.
252 is an undulating number in base 10.
It is a plaindrome in base 15.
It is a nialpdrome in base 2, base 4, base 6, base 7, base 9 and base 16.
It is a zygodrome in base 2 and base 6.
It is a congruent number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
252 is a wasteful number, since it uses less digits than its factorization.
252 is an evil number, because the sum of its binary digits is even.
The square root of 252 is about 15.8745078664. The cubic root of 252 is about 6.3163595977.
Adding to 252 its product of digits (20), we get a palindrome (272).
Subtracting from 252 its product of digits (20), we obtain a palindrome (232).
The spelling of 252 in words is "two hundred fifty-two", and thus it is an aban number.