87081 has 4 divisors (see below), whose sum is σ = 116112. Its totient is φ = 58052.

The previous prime is 87071. The next prime is 87083. The reversal of 87081 is 18078.

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.

It is a cyclic number.

It is not a de Polignac number, because 87081 - 2⁵ = 87049 is a prime.

It is a super-2 number, since 2×87081² = 15166201122, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (87083) 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, 14511 + ... + 14516.

It is an arithmetic number, because the mean of its divisors is an integer number (29028).

2⁸⁷⁰⁸¹ is an apocalyptic number.

It is an amenable number.

87081 is a deficient number, since it is larger than the sum of its proper divisors (29031).

87081 is a wasteful number, since it uses less digits than its factorization.

87081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29030.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 87081 is about 295.0948999898. The cubic root of 87081 is about 44.3242234785.

The spelling of 87081 in words is "eighty-seven thousand, eighty-one".