442133421 has 4 divisors (see below), whose sum is σ = 589511232. Its totient is φ = 294755612.

The previous prime is 442133413. The next prime is 442133423. The reversal of 442133421 is 124331244.

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 442133421 - 2³ = 442133413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442133391 and 442133400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442133423) 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, 73688901 + ... + 73688906.

It is an arithmetic number, because the mean of its divisors is an integer number (147377808).

Almost surely, 2^442133421 is an apocalyptic number.

It is an amenable number.

442133421 is a deficient number, since it is larger than the sum of its proper divisors (147377811).

442133421 is a wasteful number, since it uses less digits than its factorization.

442133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147377810.

The product of its digits is 2304, while the sum is 24.

The square root of 442133421 is about 21026.9688971093. The cubic root of 442133421 is about 761.8177983507.

Adding to 442133421 its reverse (124331244), we get a palindrome (566464665).

The spelling of 442133421 in words is "four hundred forty-two million, one hundred thirty-three thousand, four hundred twenty-one".