It is a tau number, because it is divible by the number of its divisors (40).
It is a plaindrome in base 13.
It is a nialpdrome in base 8.
It is an unprimeable number.
2135680 is an apocalyptic number.
135680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 135680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165726).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
135680 is an frugal number, since it uses more digits than its factorization.
135680 is an odious number, because the sum of its binary digits is odd.
The square root of 135680 is about 368.3476618631. The cubic root of 135680 is about 51.3852663085.
The spelling of 135680 in words is "one hundred thirty-five thousand, six hundred eighty".