442214021 has 8 divisors (see below), whose sum is σ = 452839200. Its totient is φ = 431604432.

The previous prime is 442214009. The next prime is 442214029. The reversal of 442214021 is 120412244.

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 442214021 - 2¹⁰ = 442212997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442213984 and 442214002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442214029) 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, 70031 + ... + 76083.

It is an arithmetic number, because the mean of its divisors is an integer number (56604900).

Almost surely, 2^442214021 is an apocalyptic number.

It is an amenable number.

442214021 is a deficient number, since it is larger than the sum of its proper divisors (10625179).

442214021 is a wasteful number, since it uses less digits than its factorization.

442214021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 442214021 is about 21028.8853960451. The cubic root of 442214021 is about 761.8640881363.

Adding to 442214021 its reverse (120412244), we get a palindrome (562626265).

The spelling of 442214021 in words is "four hundred forty-two million, two hundred fourteen thousand, twenty-one".