160581 has 4 divisors (see below), whose sum is σ = 214112. Its totient is φ = 107052.

The previous prime is 160579. The next prime is 160583. The reversal of 160581 is 185061.

160581 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 an emirpimes, since its reverse is a distinct semiprime: 185061 = 3 ⋅61687.

It is an interprime number because it is at equal distance from previous prime (160579) and next prime (160583).

It is not a de Polignac number, because 160581 - 2¹ = 160579 is a prime.

It is a super-2 number, since 2×160581² = 51572515122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160583) 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, 26761 + ... + 26766.

It is an arithmetic number, because the mean of its divisors is an integer number (53528).

2¹⁶⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

160581 is a deficient number, since it is larger than the sum of its proper divisors (53531).

160581 is an equidigital number, since it uses as much as digits as its factorization.

160581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53530.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 160581 is about 400.7255918955. The cubic root of 160581 is about 54.3539844801.

It can be divided in two parts, 160 and 581, that added together give a triangular number (741 = T₃₈).

The spelling of 160581 in words is "one hundred sixty thousand, five hundred eighty-one".