442505123 has 4 divisors (see below), whose sum is σ = 442615680. Its totient is φ = 442394568.

The previous prime is 442505111. The next prime is 442505153. The reversal of 442505123 is 321505244.

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 442505123 - 2¹² = 442501027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442505092 and 442505101.

It is not an unprimeable number, because it can be changed into a prime (442505153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49040 + ... + 57357.

It is an arithmetic number, because the mean of its divisors is an integer number (110653920).

Almost surely, 2^442505123 is an apocalyptic number.

442505123 is a deficient number, since it is larger than the sum of its proper divisors (110557).

442505123 is a wasteful number, since it uses less digits than its factorization.

442505123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110556.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 442505123 is about 21035.8057368859. The cubic root of 442505123 is about 762.0312255421.

The spelling of 442505123 in words is "four hundred forty-two million, five hundred five thousand, one hundred twenty-three".