57842 has 4 divisors (see below), whose sum is σ = 86766. Its totient is φ = 28920.

The previous prime is 57839. The next prime is 57847. The reversal of 57842 is 24875.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43681 + 14161 = 209^2 + 119^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (57847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14459 + ... + 14462.

2⁵⁷⁸⁴² is an apocalyptic number.

57842 is a deficient number, since it is larger than the sum of its proper divisors (28924).

57842 is a wasteful number, since it uses less digits than its factorization.

57842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28923.

The product of its digits is 2240, while the sum is 26.

The square root of 57842 is about 240.5036382261. The cubic root of 57842 is about 38.6735851011.

The spelling of 57842 in words is "fifty-seven thousand, eight hundred forty-two".