341 is nontrivially palindromic in base 2, base 4 and base 8.
341 is an esthetic number in base 2, because in such base its adjacent digits differ by 1.
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: 143 = 11 ⋅13.
It is a cyclic number.
It is the 10-th Jacobsthal number.
It is an Ulam number.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
341 is an undulating number in base 2 and base 8.
It is a Curzon number.
341 is a nontrivial repdigit in base 4.
It is a plaindrome in base 4, base 12, base 15 and base 16.
It is a nialpdrome in base 4 and base 7.
It is a zygodrome in base 4.
It is a congruent number.
It is a Poulet number, since it divides 2340-1.
341 is a gapful number since it is divisible by the number (31) formed by its first and last digit.
341 is the 11-th octagonal number.
It is an amenable number.
341 is a wasteful number, since it uses less digits than its factorization.
341 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 42.
The square root of 341 is about 18.4661853126. The cubic root of 341 is about 6.9863680278.
Adding to 341 its product of digits (12), we get a palindrome (353).
Adding to 341 its reverse (143), we get a palindrome (484).