Subtracting from 11641 its sum of digits (13), we obtain a triangular number (11628 = T152).
11641 is nontrivially palindromic in base 6.
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: 14611 = 19 ⋅769.
It is a cyclic number.
It is a Duffinian number.
11641 is a lucky number.
It is a congruent number.
211641 is an apocalyptic number.
It is an amenable number.
11641 is an equidigital number, since it uses as much as digits as its factorization.
11641 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1670.
The square root of 11641 is about 107.8934659745. The cubic root of 11641 is about 22.6636626161.
The spelling of 11641 in words is "eleven thousand, six hundred forty-one".