42208122 has 16 divisors (see below), whose sum is σ = 92090592. Its totient is φ = 12790320.

The previous prime is 42208121. The next prime is 42208123. The reversal of 42208122 is 22180224.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42208121) and next prime (42208123).

It is not an unprimeable number, because it can be changed into a prime (42208121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319693 + ... + 319824.

It is an arithmetic number, because the mean of its divisors is an integer number (5755662).

Almost surely, 2^42208122 is an apocalyptic number.

42208122 is an abundant number, since it is smaller than the sum of its proper divisors (49882470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42208122 is a wasteful number, since it uses less digits than its factorization.

42208122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639533.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 42208122 is about 6496.7778167335. Note that the first 3 decimals coincide. The cubic root of 42208122 is about 348.1758755597.

Adding to 42208122 its reverse (22180224), we get a palindrome (64388346).

The spelling of 42208122 in words is "forty-two million, two hundred eight thousand, one hundred twenty-two".