442873 has 4 divisors (see below), whose sum is σ = 447120. Its totient is φ = 438628.

The previous prime is 442861. The next prime is 442879. The reversal of 442873 is 378244.

442873 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442873 is a prime.

It is a super-2 number, since 2×442873² = 392272988258, which contains 22 as substring.

It is a Duffinian number.

442873 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (442879) 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 in 3 ways as a sum of consecutive naturals, for example, 1963 + ... + 2176.

It is an arithmetic number, because the mean of its divisors is an integer number (111780).

2⁴⁴²⁸⁷³ is an apocalyptic number.

It is an amenable number.

442873 is a deficient number, since it is larger than the sum of its proper divisors (4247).

442873 is a wasteful number, since it uses less digits than its factorization.

442873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246.

The product of its digits is 5376, while the sum is 28.

The square root of 442873 is about 665.4870396935. The cubic root of 442873 is about 76.2242338813.

The spelling of 442873 in words is "four hundred forty-two thousand, eight hundred seventy-three".