857825 has 6 divisors (see below), whose sum is σ = 1063734. Its totient is φ = 686240.

The previous prime is 857821. The next prime is 857827. The reversal of 857825 is 528758.

857825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 18769 + 839056 = 137^2 + 916^2 .

It is not a de Polignac number, because 857825 - 2² = 857821 is a prime.

It is a d-powerful number, because it can be written as 8 + 5⁴ + 8⁵ + 7⁷ + 2⁸ + 5⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17132 + ... + 17181.

It is an arithmetic number, because the mean of its divisors is an integer number (177289).

2⁸⁵⁷⁸²⁵ is an apocalyptic number.

It is an amenable number.

857825 is a deficient number, since it is larger than the sum of its proper divisors (205909).

857825 is a wasteful number, since it uses less digits than its factorization.

857825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34323 (or 34318 counting only the distinct ones).

The product of its digits is 22400, while the sum is 35.

The square root of 857825 is about 926.1884257536. The cubic root of 857825 is about 95.0166175917.

The spelling of 857825 in words is "eight hundred fifty-seven thousand, eight hundred twenty-five".