Multipling 161604 by its product of nonzero digits (144), we get a square (23270976 = 48242).
Adding to 161604 its reverse (406161), we get a palindrome (567765).
The square root of 161604 is 402.
161604 is a `hidden beast` number, since 1 + 61 + 604 = 666.
161604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an unprimeable number.
2161604 is an apocalyptic number.
161604 is the 402-nd square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 161604
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161604 is a wasteful number, since it uses less digits than its factorization.
161604 is an odious number, because the sum of its binary digits is odd.
The cubic root of 161604 is about 54.4691630395.
The spelling of 161604 in words is "one hundred sixty-one thousand, six hundred four".