122420042 has 4 divisors (see below), whose sum is σ = 183630066. Its totient is φ = 61210020.

The previous prime is 122420041. The next prime is 122420063. The reversal of 122420042 is 240024221.

It is a happy number.

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., 108139201 + 14280841 = 10399^2 + 3779^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 122420042.

It is not an unprimeable number, because it can be changed into a prime (122420041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30605009 + ... + 30605012.

Almost surely, 2^122420042 is an apocalyptic number.

122420042 is a deficient number, since it is larger than the sum of its proper divisors (61210024).

122420042 is an equidigital number, since it uses as much as digits as its factorization.

122420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61210023.

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

The square root of 122420042 is about 11064.3590867253. The cubic root of 122420042 is about 496.5361144085.

Adding to 122420042 its reverse (240024221), we get a palindrome (362444263).

The spelling of 122420042 in words is "one hundred twenty-two million, four hundred twenty thousand, forty-two".