442123 has 4 divisors (see below), whose sum is σ = 482328. Its totient is φ = 401920.

The previous prime is 442121. The next prime is 442139. The reversal of 442123 is 321244.

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

It is a cyclic number.

It is not a de Polignac number, because 442123 - 2¹ = 442121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442097 and 442106.

It is not an unprimeable number, because it can be changed into a prime (442121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20086 + ... + 20107.

It is an arithmetic number, because the mean of its divisors is an integer number (120582).

2⁴⁴²¹²³ is an apocalyptic number.

442123 is a deficient number, since it is larger than the sum of its proper divisors (40205).

442123 is a wasteful number, since it uses less digits than its factorization.

442123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40204.

The product of its digits is 192, while the sum is 16.

The square root of 442123 is about 664.9233038479. The cubic root of 442123 is about 76.1811813004.

Adding to 442123 its reverse (321244), we get a palindrome (763367).

It can be divided in two parts, 4421 and 23, that added together give a palindrome (4444).

The spelling of 442123 in words is "four hundred forty-two thousand, one hundred twenty-three", and thus it is an iban number.