1965 is nontrivially palindromic in base 4.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a Curzon number.
1965 is a lucky number.
It is a plaindrome in base 12 and base 16.
It is a nialpdrome in base 13.
It is a congruent number.
It is an unprimeable number.
1965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
1965 is a wasteful number, since it uses less digits than its factorization.
1965 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 139.
The square root of 1965 is about 44.3283205186. The cubic root of 1965 is about 12.5252821638.
The spelling of 1965 in words is "one thousand, nine hundred sixty-five".