858081 has 16 divisors (see below), whose sum is σ = 1353600. Its totient is φ = 473088.

The previous prime is 858073. The next prime is 858083. The reversal of 858081 is 180858.

It is not a de Polignac number, because 858081 - 2³ = 858073 is a prime.

It is a super-2 number, since 2×858081² = 1472606005122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (858083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (84600).

2⁸⁵⁸⁰⁸¹ is an apocalyptic number.

It is an amenable number.

858081 is a deficient number, since it is larger than the sum of its proper divisors (495519).

858081 is a wasteful number, since it uses less digits than its factorization.

858081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 858081 is about 926.3266162645. The cubic root of 858081 is about 95.0260685616.

The spelling of 858081 in words is "eight hundred fifty-eight thousand, eighty-one".