Adding to 133424 its reverse (424331), we get a palindrome (557755).
133424 is an admirable number.
It is an unprimeable number.
133424 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2133424 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 133424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133920).
133424 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
133424 is a wasteful number, since it uses less digits than its factorization.
133424 is an odious number, because the sum of its binary digits is odd.
The square root of 133424 is about 365.2725010181. The cubic root of 133424 is about 51.0988726561.
The spelling of 133424 in words is "one hundred thirty-three thousand, four hundred twenty-four".