160561 has 4 divisors (see below), whose sum is σ = 161392. Its totient is φ = 159732.

The previous prime is 160553. The next prime is 160579. The reversal of 160561 is 165061.

160561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 165061 = 13 ⋅12697.

It is a cyclic number.

It is not a de Polignac number, because 160561 - 2³ = 160553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46 + ... + 568.

It is an arithmetic number, because the mean of its divisors is an integer number (40348).

2¹⁶⁰⁵⁶¹ is an apocalyptic number.

It is an amenable number.

160561 is a deficient number, since it is larger than the sum of its proper divisors (831).

160561 is an equidigital number, since it uses as much as digits as its factorization.

160561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830.

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

The square root of 160561 is about 400.7006363858. The cubic root of 160561 is about 54.3517278312.

The spelling of 160561 in words is "one hundred sixty thousand, five hundred sixty-one".