42420122 has 8 divisors (see below), whose sum is σ = 66979200. Its totient is φ = 20093724.

The previous prime is 42420109. The next prime is 42420181. The reversal of 42420122 is 22102424.

It is a happy number.

42420122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42420122.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 558122 + ... + 558197.

It is an arithmetic number, because the mean of its divisors is an integer number (8372400).

Almost surely, 2^42420122 is an apocalyptic number.

42420122 is a deficient number, since it is larger than the sum of its proper divisors (24559078).

42420122 is a wasteful number, since it uses less digits than its factorization.

42420122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116340.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42420122 is about 6513.0731609587. The cubic root of 42420122 is about 348.7578334421.

Adding to 42420122 its reverse (22102424), we get a palindrome (64522546).

The spelling of 42420122 in words is "forty-two million, four hundred twenty thousand, one hundred twenty-two".