858249 has 32 divisors (see below), whose sum is σ = 1536000. Its totient is φ = 462672.

The previous prime is 858241. The next prime is 858251. The reversal of 858249 is 942858.

It is not a de Polignac number, because 858249 - 2³ = 858241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (858241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3472 + ... + 3710.

It is an arithmetic number, because the mean of its divisors is an integer number (48000).

2⁸⁵⁸²⁴⁹ is an apocalyptic number.

It is an amenable number.

858249 is a deficient number, since it is larger than the sum of its proper divisors (677751).

858249 is a wasteful number, since it uses less digits than its factorization.

858249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 268 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 858249 is about 926.4172925847. The cubic root of 858249 is about 95.0322697391.

The spelling of 858249 in words is "eight hundred fifty-eight thousand, two hundred forty-nine".