42806122 has 4 divisors (see below), whose sum is σ = 64209186. Its totient is φ = 21403060.

The previous prime is 42806111. The next prime is 42806129. The reversal of 42806122 is 22160824.

It is a happy number.

42806122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30702681 + 12103441 = 5541^2 + 3479^2 .

It is not an unprimeable number, because it can be changed into a prime (42806129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701529 + ... + 10701532.

Almost surely, 2^42806122 is an apocalyptic number.

42806122 is a deficient number, since it is larger than the sum of its proper divisors (21403064).

42806122 is a wasteful number, since it uses less digits than its factorization.

42806122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21403063.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 42806122 is about 6542.6387642908. The cubic root of 42806122 is about 349.8124764170.

Adding to 42806122 its reverse (22160824), we get a palindrome (64966946).

The spelling of 42806122 in words is "forty-two million, eight hundred six thousand, one hundred twenty-two".