442203421 has 8 divisors (see below), whose sum is σ = 483357600. Its totient is φ = 401208240.

The previous prime is 442203373. The next prime is 442203431. The reversal of 442203421 is 124302244.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442203421 - 2⁹ = 442202909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442203392 and 442203401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442203431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33891 + ... + 45088.

It is an arithmetic number, because the mean of its divisors is an integer number (60419700).

Almost surely, 2^442203421 is an apocalyptic number.

It is an amenable number.

442203421 is a deficient number, since it is larger than the sum of its proper divisors (41154179).

442203421 is a wasteful number, since it uses less digits than its factorization.

442203421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79499.

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

The square root of 442203421 is about 21028.6333602543. The cubic root of 442203421 is about 761.8580007190.

Adding to 442203421 its reverse (124302244), we get a palindrome (566505665).

The spelling of 442203421 in words is "four hundred forty-two million, two hundred three thousand, four hundred twenty-one".