Subtracting from 71656 its sum of digits (25), we obtain a triangular number (71631 = T378).
It is a self number, because there is not a number n which added to its sum of digits gives 71656.
It is an unprimeable number.
271656 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 71656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74115).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
71656 is a wasteful number, since it uses less digits than its factorization.
71656 is an odious number, because the sum of its binary digits is odd.
The square root of 71656 is about 267.6863836657. The cubic root of 71656 is about 41.5353161418.
The spelling of 71656 in words is "seventy-one thousand, six hundred fifty-six".