442101423 has 32 divisors (see below), whose sum is σ = 625936896. Its totient is φ = 277004288.

The previous prime is 442101403. The next prime is 442101427. The reversal of 442101423 is 324101244.

It is a cyclic number.

It is not a de Polignac number, because 442101423 - 2⁵ = 442101391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442101423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442101427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1720111 + ... + 1720367.

It is an arithmetic number, because the mean of its divisors is an integer number (19560528).

Almost surely, 2^442101423 is an apocalyptic number.

442101423 is a deficient number, since it is larger than the sum of its proper divisors (183835473).

442101423 is a wasteful number, since it uses less digits than its factorization.

442101423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 442101423 is about 21026.2080033467. The cubic root of 442101423 is about 761.7994198607.

Adding to 442101423 its reverse (324101244), we get a palindrome (766202667).

The spelling of 442101423 in words is "four hundred forty-two million, one hundred one thousand, four hundred twenty-three".