57142 has 4 divisors (see below), whose sum is σ = 85716. Its totient is φ = 28570.

The previous prime is 57139. The next prime is 57143. The reversal of 57142 is 24175.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14284 + ... + 14287.

It is an arithmetic number, because the mean of its divisors is an integer number (21429).

2⁵⁷¹⁴² is an apocalyptic number.

57142 is a deficient number, since it is larger than the sum of its proper divisors (28574).

57142 is a wasteful number, since it uses less digits than its factorization.

57142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28573.

The product of its digits is 280, while the sum is 19.

The square root of 57142 is about 239.0439290172. The cubic root of 57142 is about 38.5169431244.

The spelling of 57142 in words is "fifty-seven thousand, one hundred forty-two".