84581 has 8 divisors (see below), whose sum is σ = 99264. Its totient is φ = 70560.

The previous prime is 84559. The next prime is 84589. The reversal of 84581 is 18548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84581 - 2¹⁰ = 83557 is a prime.

It is a super-2 number, since 2×84581² = 14307891122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84581.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84581.

It is not an unprimeable number, because it can be changed into a prime (84589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161 + ... + 441.

It is an arithmetic number, because the mean of its divisors is an integer number (12408).

2⁸⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

84581 is a deficient number, since it is larger than the sum of its proper divisors (14683).

84581 is a wasteful number, since it uses less digits than its factorization.

84581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its digits is 1280, while the sum is 26.

The square root of 84581 is about 290.8281279381. The cubic root of 84581 is about 43.8959317390.

The spelling of 84581 in words is "eighty-four thousand, five hundred eighty-one".