• 120 can be written using four 4's:
120 is nontrivially palindromic in base 11 and base 14.
120 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
120 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.
120 is an admirable number.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
120 is an idoneal number.
120 is strictly pandigital in base 4.
120 is a nontrivial repdigit in base 11 and base 14.
It is a plaindrome in base 11, base 14 and base 16.
It is a nialpdrome in base 2, base 3, base 5, base 6, base 11, base 12, base 13, base 14 and base 15.
It is a zygodrome in base 2, base 11 and base 14.
It is a congruent number.
120 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is the 8-th tetrahedral number.
In principle, a polygon with 120 sides can be constructed with ruler and compass.
It is equal to the Eulerian number A(7, 1).
120 is a highly composite number, because it has more divisors than any smaller number.
120 is a superabundant number, because it has a larger abundancy index than any smaller number.
120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
120 is a wasteful number, since it uses less digits than its factorization.
120 is an evil number, because the sum of its binary digits is even.
The square root of 120 is about 10.9544511501. The cubic root of 120 is about 4.9324241487.
Adding to 120 its reverse (21), we get a palindrome (141).
Subtracting from 120 its reverse (21), we obtain a palindrome (99).