Adding to 2501 its reverse (1052), we get a palindrome (3553).
2501 is nontrivially palindromic in base 15.
2501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a cyclic number.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
2501 is an undulating number in base 15.
It is a Curzon number.
It is a plaindrome in base 9.
It is a nialpdrome in base 14.
It is a congruent number.
2501 is a Friedman number, since it can be written as 50^2+1, using all its digits and the basic arithmetic operations.
22501 is an apocalyptic number.
2501 is the 41-st pentagonal number.
It is an amenable number.
2501 is an equidigital number, since it uses as much as digits as its factorization.
2501 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 102.
The square root of 2501 is about 50.0099990002. The cubic root of 2501 is about 13.5738974535.
The spelling of 2501 in words is "two thousand, five hundred one".