858042 has 24 divisors (see below), whose sum is σ = 1887444. Its totient is φ = 281664.

The previous prime is 858029. The next prime is 858043. The reversal of 858042 is 240858.

It can be written as a sum of positive squares in 2 ways, for example, as 848241 + 9801 = 921^2 + 99^2 .

It is a junction number, because it is equal to n+sod(n) for n = 857997 and 858015.

It is not an unprimeable number, because it can be changed into a prime (858043) 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, 988 + ... + 1640.

2⁸⁵⁸⁰⁴² is an apocalyptic number.

858042 is an abundant number, since it is smaller than the sum of its proper divisors (1029402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

858042 is a wasteful number, since it uses less digits than its factorization.

858042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 858042 is about 926.3055651350. The cubic root of 858042 is about 95.0246288868.

The spelling of 858042 in words is "eight hundred fifty-eight thousand, forty-two".