442735721 has 8 divisors (see below), whose sum is σ = 458734080. Its totient is φ = 426786192.

The previous prime is 442735693. The next prime is 442735771. The reversal of 442735721 is 127537244.

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 442735721 - 2¹⁴ = 442719337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442735771) 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, 6776 + ... + 30518.

It is an arithmetic number, because the mean of its divisors is an integer number (57341760).

Almost surely, 2^442735721 is an apocalyptic number.

It is an amenable number.

442735721 is a deficient number, since it is larger than the sum of its proper divisors (15998359).

442735721 is a wasteful number, since it uses less digits than its factorization.

442735721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24415.

The product of its digits is 47040, while the sum is 35.

The square root of 442735721 is about 21041.2861061295. The cubic root of 442735721 is about 762.1635723046.

It can be divided in two parts, 44273 and 5721, that added together give a palindrome (49994).

The spelling of 442735721 in words is "four hundred forty-two million, seven hundred thirty-five thousand, seven hundred twenty-one".