442402123 has 4 divisors (see below), whose sum is σ = 444334240. Its totient is φ = 440470008.

The previous prime is 442402097. The next prime is 442402199. The reversal of 442402123 is 321204244.

It is a happy number.

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 442402123 - 2²¹ = 440304971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442402094 and 442402103.

It is not an unprimeable number, because it can be changed into a prime (442403123) 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, 965715 + ... + 966172.

It is an arithmetic number, because the mean of its divisors is an integer number (111083560).

Almost surely, 2^442402123 is an apocalyptic number.

442402123 is a deficient number, since it is larger than the sum of its proper divisors (1932117).

442402123 is a wasteful number, since it uses less digits than its factorization.

442402123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932116.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 442402123 is about 21033.3573877306. The cubic root of 442402123 is about 761.9720960520.

Adding to 442402123 its reverse (321204244), we get a palindrome (763606367).

The spelling of 442402123 in words is "four hundred forty-two million, four hundred two thousand, one hundred twenty-three".