858425 has 6 divisors (see below), whose sum is σ = 1064478. Its totient is φ = 686720.

The previous prime is 858397. The next prime is 858427. The reversal of 858425 is 524858.

858425 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 41209 + 817216 = 203^2 + 904^2 .

It is not a de Polignac number, because 858425 - 2¹⁴ = 842041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 858391 and 858400.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 858425.

It is not an unprimeable number, because it can be changed into a prime (858427) 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, 17144 + ... + 17193.

It is an arithmetic number, because the mean of its divisors is an integer number (177413).

2⁸⁵⁸⁴²⁵ is an apocalyptic number.

It is an amenable number.

858425 is a deficient number, since it is larger than the sum of its proper divisors (206053).

858425 is a wasteful number, since it uses less digits than its factorization.

858425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34347 (or 34342 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 858425 is about 926.5122773067. The cubic root of 858425 is about 95.0387653428.

The spelling of 858425 in words is "eight hundred fifty-eight thousand, four hundred twenty-five".