27081 has 16 divisors (see below), whose sum is σ = 43200. Its totient is φ = 16704.

The previous prime is 27077. The next prime is 27091. The reversal of 27081 is 18072.

It is not a de Polignac number, because 27081 - 2² = 27077 is a prime.

It is a super-2 number, since 2×27081² = 1466761122, which contains 22 as substring.

27081 is a modest number, since divided by 81 gives 27 as remainder.

It is a Curzon number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (27011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430 + ... + 488.

It is an arithmetic number, because the mean of its divisors is an integer number (2700).

2²⁷⁰⁸¹ is an apocalyptic number.

It is an amenable number.

27081 is a deficient number, since it is larger than the sum of its proper divisors (16119).

27081 is a wasteful number, since it uses less digits than its factorization.

27081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 27081 is about 164.5630578228. The cubic root of 27081 is about 30.0299700499.

Subtracting from 27081 its reverse (18072), we obtain a palindrome (9009).

It can be divided in two parts, 270 and 81, that added together give a triangular number (351 = T₂₆).

The spelling of 27081 in words is "twenty-seven thousand, eighty-one".