84081 has 4 divisors (see below), whose sum is σ = 112112. Its totient is φ = 56052.

The previous prime is 84067. The next prime is 84089. The reversal of 84081 is 18048.

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 not a de Polignac number, because 84081 - 2⁶ = 84017 is a prime.

It is a super-2 number, since 2×84081² = 14139229122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84089) 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, 14011 + ... + 14016.

It is an arithmetic number, because the mean of its divisors is an integer number (28028).

2⁸⁴⁰⁸¹ is an apocalyptic number.

It is an amenable number.

84081 is a deficient number, since it is larger than the sum of its proper divisors (28031).

84081 is a wasteful number, since it uses less digits than its factorization.

84081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28030.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 84081 is about 289.9672395289. The cubic root of 84081 is about 43.8092639023.

The spelling of 84081 in words is "eighty-four thousand, eighty-one".