122440042 has 4 divisors (see below), whose sum is σ = 183660066. Its totient is φ = 61220020.

The previous prime is 122440039. The next prime is 122440081. The reversal of 122440042 is 240044221.

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., 114254721 + 8185321 = 10689^2 + 2861^2 .

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 as a sum of consecutive naturals, namely, 30610009 + ... + 30610012.

Almost surely, 2^122440042 is an apocalyptic number.

122440042 is a deficient number, since it is larger than the sum of its proper divisors (61220024).

122440042 is an equidigital number, since it uses as much as digits as its factorization.

122440042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61220023.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 122440042 is about 11065.2628527297. The cubic root of 122440042 is about 496.5631529592.

Adding to 122440042 its reverse (240044221), we get a palindrome (362484263).

The spelling of 122440042 in words is "one hundred twenty-two million, four hundred forty thousand, forty-two".