Adding to 3901 its reverse (1093), we get a palindrome (4994).
It is a happy number.
It is the 26-th star number.
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.
It is a congruent number.
It is a 30-hyperperfect number.
23901 is an apocalyptic number.
3901 is the 40-th centered pentagonal number.
It is an amenable number.
3901 is an equidigital number, since it uses as much as digits as its factorization.
3901 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 130.
The square root of 3901 is about 62.4579858785. The cubic root of 3901 is about 15.7419544026.
The spelling of 3901 in words is "three thousand, nine hundred one".