161560 has 32 divisors (see below), whose sum is σ = 416160. Its totient is φ = 55296.

The previous prime is 161543. The next prime is 161561. The reversal of 161560 is 65161.

161560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161560² = 52203267200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161561) by changing a digit.

161560 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9 + ... + 568.

It is an arithmetic number, because the mean of its divisors is an integer number (13005).

2¹⁶¹⁵⁶⁰ is an apocalyptic number.

161560 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 161560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208080).

161560 is an abundant number, since it is smaller than the sum of its proper divisors (254600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161560 is a wasteful number, since it uses less digits than its factorization.

161560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 161560 is about 401.9452699062. The cubic root of 161560 is about 54.4642191422.

The spelling of 161560 in words is "one hundred sixty-one thousand, five hundred sixty".