2104 is nontrivially palindromic in base 16.
It is a tau number, because it is divible by the number of its divisors (8).
2104 is an undulating number in base 16.
It is a nialpdrome in base 14 and base 15.
It is a congruent number.
It is an unprimeable number.
It is an amenable number.
2104 is a wasteful number, since it uses less digits than its factorization.
2104 is an evil number, because the sum of its binary digits is even.
The square root of 2104 is about 45.8693797647. The cubic root of 2104 is about 12.8139171544.
Adding to 2104 its reverse (4012), we get a palindrome (6116).
The spelling of 2104 in words is "two thousand, one hundred four", and thus it is an iban number.