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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7531 = 17 ⋅443.
It is a cyclic number.
It is a Duffinian number.
1357 is a lucky number.
It is a straight-line number, since its digits are in arithmetic progression.
It is a plaindrome in base 10 and base 14.
It is a nialpdrome in base 12.
It is a self number, because there is not a number n which added to its sum of digits gives 1357.
It is a congruent number.
It is an amenable number.
1357 is an equidigital number, since it uses as much as digits as its factorization.
1357 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 82.
The square root of 1357 is about 36.8374809128. The cubic root of 1357 is about 11.0711639598.
Multiplying 1357 by its sum of digits (16), we get a palindrome (21712).
Adding to 1357 its reverse (7531), we get a palindrome (8888).
The spelling of 1357 in words is "one thousand, three hundred fifty-seven".