It is a happy number.
It is an alternating number because its digits alternate between odd and even.
It is a nialpdrome in base 6 and base 11.
It is a zygodrome in base 4.
21290 is an apocalyptic number.
1290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 1290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1290 is a wasteful number, since it uses less digits than its factorization.
1290 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 53.
The square root of 1290 is about 35.9165699921. The cubic root of 1290 is about 10.8858723345.
Multiplying 1290 by its product of nonzero digits (18), we get a triangular number (23220 = T215).
Adding to 1290 its reverse (921), we get a triangular number (2211 = T66).
The spelling of 1290 in words is "one thousand, two hundred ninety".