858213 has 12 divisors (see below), whose sum is σ = 1249248. Its totient is φ = 567720.

The previous prime is 858167. The next prime is 858217. The reversal of 858213 is 312858.

It is a happy number.

It is not a de Polignac number, because 858213 - 2⁶ = 858149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1218 + ... + 1788.

It is an arithmetic number, because the mean of its divisors is an integer number (104104).

2⁸⁵⁸²¹³ is an apocalyptic number.

It is an amenable number.

858213 is a deficient number, since it is larger than the sum of its proper divisors (391035).

858213 is a wasteful number, since it uses less digits than its factorization.

858213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 741 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 858213 is about 926.3978626918. The cubic root of 858213 is about 95.0309409835.

The spelling of 858213 in words is "eight hundred fifty-eight thousand, two hundred thirteen".