442547021 has 8 divisors (see below), whose sum is σ = 505916544. Its totient is φ = 379214640.

The previous prime is 442547003. The next prime is 442547029. The reversal of 442547021 is 120745244.

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

It is not a de Polignac number, because 442547021 - 2¹⁴ = 442530637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442547029) 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, 24416 + ... + 38486.

It is an arithmetic number, because the mean of its divisors is an integer number (63239568).

Almost surely, 2^442547021 is an apocalyptic number.

It is an amenable number.

442547021 is a deficient number, since it is larger than the sum of its proper divisors (63369523).

442547021 is a wasteful number, since it uses less digits than its factorization.

442547021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18571.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 442547021 is about 21036.8015867432. The cubic root of 442547021 is about 762.0552754156.

The spelling of 442547021 in words is "four hundred forty-two million, five hundred forty-seven thousand, twenty-one".