Adding to 1501 its reverse (1051), we get a palindrome (2552).
1501 is nontrivially palindromic in base 2.
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.
It is a cyclic number.
It is a Duffinian number.
1501 is a lucky number.
It is a plaindrome in base 11 and base 16.
It is a nialpdrome in base 12.
It is a congruent number.
21501 is an apocalyptic number.
1501 is the 25-th centered pentagonal number.
It is an amenable number.
1501 is an equidigital number, since it uses as much as digits as its factorization.
1501 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 98.
The square root of 1501 is about 38.7427412556. The cubic root of 1501 is about 11.4496856699.
The spelling of 1501 in words is "one thousand, five hundred one".