42858 has 12 divisors (see below), whose sum is σ = 92898. Its totient is φ = 14280.

The previous prime is 42853. The next prime is 42859. The reversal of 42858 is 85824.

It can be written as a sum of positive squares in only one way, i.e., 42849 + 9 = 207^2 + 3^2 .

It is a Curzon number.

It is a plaindrome in base 13.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (42853) 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, 1173 + ... + 1208.

2⁴²⁸⁵⁸ is an apocalyptic number.

42858 is an abundant number, since it is smaller than the sum of its proper divisors (50040).

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

42858 is a wasteful number, since it uses less digits than its factorization.

42858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389 (or 2386 counting only the distinct ones).

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

The square root of 42858 is about 207.0217379890. The cubic root of 42858 is about 34.9953735381.

It can be divided in two parts, 42 and 858, that added together give a square (900 = 30²).

The spelling of 42858 in words is "forty-two thousand, eight hundred fifty-eight".