81160 has 16 divisors (see below), whose sum is σ = 182700. Its totient is φ = 32448.

The previous prime is 81157. The next prime is 81163. The reversal of 81160 is 6118.

81160 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (81157) and next prime (81163).

It can be written as a sum of positive squares in 2 ways, for example, as 75076 + 6084 = 274^2 + 78^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (81163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975 + ... + 1054.

2⁸¹¹⁶⁰ is an apocalyptic number.

It is an amenable number.

81160 is an abundant number, since it is smaller than the sum of its proper divisors (101540).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91350).

81160 is a wasteful number, since it uses less digits than its factorization.

81160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 81160 is about 284.8859420891. The cubic root of 81160 is about 43.2959572521.

Adding to 81160 its reverse (6118), we get a palindrome (87278).

The spelling of 81160 in words is "eighty-one thousand, one hundred sixty".