Adding to 261632 its reverse (236162), we get a palindrome (497794).
261632 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.
It is a nialpdrome in base 2, base 4 and base 8.
It is a zygodrome in base 2 and base 8.
It is a congruent number.
2261632 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 261632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302808).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
261632 is an frugal number, since it uses more digits than its factorization.
261632 is an odious number, because the sum of its binary digits is odd.
The square root of 261632 is about 511.4997556207. The cubic root of 261632 is about 63.9583061771.
The spelling of 261632 in words is "two hundred sixty-one thousand, six hundred thirty-two".