42730042 has 16 divisors (see below), whose sum is σ = 66949920. Its totient is φ = 20433168.

The previous prime is 42730019. The next prime is 42730049. The reversal of 42730042 is 24003724.

It is a junction number, because it is equal to n+sod(n) for n = 42729995 and 42730022.

It is not an unprimeable number, because it can be changed into a prime (42730049) 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, 528 + ... + 9259.

It is an arithmetic number, because the mean of its divisors is an integer number (4184370).

Almost surely, 2^42730042 is an apocalyptic number.

42730042 is a deficient number, since it is larger than the sum of its proper divisors (24219878).

42730042 is a wasteful number, since it uses less digits than its factorization.

42730042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9885.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 42730042 is about 6536.8220107327. The cubic root of 42730042 is about 349.6051110952.

Adding to 42730042 its reverse (24003724), we get a palindrome (66733766).

The spelling of 42730042 in words is "forty-two million, seven hundred thirty thousand, forty-two".