It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a Curzon number.
It is a plaindrome in base 9 and base 11.
It is a nialpdrome in base 8 and base 13.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1745.
It is an amenable number.
1745 is an equidigital number, since it uses as much as digits as its factorization.
1745 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 354.
The square root of 1745 is about 41.7731971484. The cubic root of 1745 is about 12.0392235052.
Subtracting from 1745 its sum of digits (17), we obtain a cube (1728 = 123).
The spelling of 1745 in words is "one thousand, seven hundred forty-five".