Adding to 3605 its reverse (5063), we get a palindrome (8668).
It is a happy number.
3605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is an Ulam number.
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 11 and base 14.
It is a self number, because there is not a number n which added to its sum of digits gives 3605.
It is a congruent number.
23605 is an apocalyptic number.
3605 is a gapful number since it is divisible by the number (35) formed by its first and last digit.
3605 is the 35-th octagonal number.
It is an amenable number.
3605 is a wasteful number, since it uses less digits than its factorization.
3605 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 115.
The square root of 3605 is about 60.0416522091. The cubic root of 3605 is about 15.3332808232. Note that the first 3 decimals are identical.
The spelling of 3605 in words is "three thousand, six hundred five".