57442 has 16 divisors (see below), whose sum is σ = 107712. Its totient is φ = 22320.

The previous prime is 57427. The next prime is 57457. The reversal of 57442 is 24475.

It is an interprime number because it is at equal distance from previous prime (57427) and next prime (57457).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33 + ... + 340.

It is an arithmetic number, because the mean of its divisors is an integer number (6732).

2⁵⁷⁴⁴² is an apocalyptic number.

57442 is a deficient number, since it is larger than the sum of its proper divisors (50270).

57442 is a wasteful number, since it uses less digits than its factorization.

57442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its digits is 1120, while the sum is 22.

The square root of 57442 is about 239.6706072926. The cubic root of 57442 is about 38.5842311672.

It can be divided in two parts, 574 and 42, that added together give a palindrome (616).

The spelling of 57442 in words is "fifty-seven thousand, four hundred forty-two".