It is a double factorial (945 = 9 !! = 1 ⋅ 3 ⋅ 5 ⋅ 7 ⋅ 9 ).
945 is nontrivially palindromic in base 8.
945 is an admirable number.
It is a Leyland number of the form 63 + 36.
It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 11, base 12 and base 13.
It is a nialpdrome in base 15.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 945.
It is an amenable number.
945 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
945 is a wasteful number, since it uses less digits than its factorization.
945 is an evil number, because the sum of its binary digits is even.
The square root of 945 is about 30.7408522979. The cubic root of 945 is about 9.8131989306.
The spelling of 945 in words is "nine hundred forty-five", and thus it is an aban number.