• 7452 = 555025 is the smallest square that contains exactly four digits '5'.
745 is nontrivially palindromic in base 13 and base 14.
745 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is an alternating number because its digits alternate between odd and even.
745 is an undulating number in base 13 and base 14.
745 is a lucky number.
It is a plaindrome in base 15.
It is a nialpdrome in base 12.
It is an amenable number.
745 is a wasteful number, since it uses less digits than its factorization.
745 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 154.
The square root of 745 is about 27.2946881279. The cubic root of 745 is about 9.0653677013.
Subtracting from 745 its sum of digits (16), we obtain a 6-th power (729 = 36).
The spelling of 745 in words is "seven hundred forty-five", and thus it is an aban number.