442420133 has 4 divisors (see below), whose sum is σ = 442687200. Its totient is φ = 442153068.

The previous prime is 442420117. The next prime is 442420171. The reversal of 442420133 is 331024244.

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 not a de Polignac number, because 442420133 - 2⁴ = 442420117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 442420099 and 442420108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442420333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131033 + ... + 134366.

It is an arithmetic number, because the mean of its divisors is an integer number (110671800).

Almost surely, 2^442420133 is an apocalyptic number.

It is an amenable number.

442420133 is a deficient number, since it is larger than the sum of its proper divisors (267067).

442420133 is a wasteful number, since it uses less digits than its factorization.

442420133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267066.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 442420133 is about 21033.7855128362. The cubic root of 442420133 is about 761.9824357637.

Adding to 442420133 its reverse (331024244), we get a palindrome (773444377).

The spelling of 442420133 in words is "four hundred forty-two million, four hundred twenty thousand, one hundred thirty-three".