42730073 has 8 divisors (see below), whose sum is σ = 43985280. Its totient is φ = 41492880.

The previous prime is 42730063. The next prime is 42730081. The reversal of 42730073 is 37003724.

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 42730073 - 2¹⁴ = 42713689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42730013) 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, 386 + ... + 9252.

It is an arithmetic number, because the mean of its divisors is an integer number (5498160).

Almost surely, 2^42730073 is an apocalyptic number.

It is an amenable number.

42730073 is a deficient number, since it is larger than the sum of its proper divisors (1255207).

42730073 is an equidigital number, since it uses as much as digits as its factorization.

42730073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 42730073 is about 6536.8243819151. The cubic root of 42730073 is about 349.6051956395.

Adding to 42730073 its reverse (37003724), we get a palindrome (79733797).

The spelling of 42730073 in words is "forty-two million, seven hundred thirty thousand, seventy-three".