Adding to 1216 its reverse (6121), we get a palindrome (7337).
1216 is nontrivially palindromic in base 13.
It is an alternating number because its digits alternate between odd and even.
1216 is an undulating number in base 13.
It is a plaindrome in base 7.
It is a nialpdrome in base 12.
It is a zygodrome in base 7.
1216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
1216 is the 19-th nonagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1216 is an equidigital number, since it uses as much as digits as its factorization.
1216 is an odious number, because the sum of its binary digits is odd.
The square root of 1216 is about 34.8711915483. The cubic root of 1216 is about 10.6736065949.
The spelling of 1216 in words is "one thousand, two hundred sixteen".