57242 has 4 divisors (see below), whose sum is σ = 85866. Its totient is φ = 28620.

The previous prime is 57241. The next prime is 57251. The reversal of 57242 is 24275.

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., 57121 + 121 = 239^2 + 11^2 .

It is not an unprimeable number, because it can be changed into a prime (57241) 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, 14309 + ... + 14312.

2⁵⁷²⁴² is an apocalyptic number.

57242 is a deficient number, since it is larger than the sum of its proper divisors (28624).

57242 is a wasteful number, since it uses less digits than its factorization.

57242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28623.

The product of its digits is 560, while the sum is 20.

The square root of 57242 is about 239.2530041609. The cubic root of 57242 is about 38.5393985842.

The spelling of 57242 in words is "fifty-seven thousand, two hundred forty-two".