1020 is nontrivially palindromic in base 11 and base 13.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is an Ulam number.
1020 is an undulating number in base 11 and base 13.
It is a nialpdrome in base 2, base 4, base 6 and base 12.
It is a zygodrome in base 2.
It is a congruent number.
In principle, a polygon with 1020 sides can be constructed with ruler and compass.
1020 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 practical number, because each smaller number is the sum of distinct divisors of 1020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1020 is a wasteful number, since it uses less digits than its factorization.
1020 is an evil number, because the sum of its binary digits is even.
The square root of 1020 is about 31.9374388453. The cubic root of 1020 is about 10.0662270956.
Adding to 1020 its reverse (201), we get a palindrome (1221).
The spelling of 1020 in words is "one thousand, twenty", and thus it is an iban number.