Subtracting from 1317 its product of digits (21), we obtain a 4-th power (1296 = 64).
Adding to 1317 its reverse (7131), we get a palindrome (8448).
1317 is nontrivially palindromic in base 2, base 12 and base 16.
1317 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7131 = 3 ⋅2377.
It is a D-number.
It is a Duffinian number.
1317 is an undulating number in base 12 and base 16.
It is a plaindrome in base 8 and base 15.
It is a nialpdrome in base 11.
It is a congruent number.
It is an amenable number.
1317 is an equidigital number, since it uses as much as digits as its factorization.
1317 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 442.
The square root of 1317 is about 36.2904946232. The cubic root of 1317 is about 10.9612964883.
The spelling of 1317 in words is "one thousand, three hundred seventeen", and thus it is an iban number.