122540042 has 4 divisors (see below), whose sum is σ = 183810066. Its totient is φ = 61270020.

The previous prime is 122540017. The next prime is 122540053. The reversal of 122540042 is 240045221.

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., 96845281 + 25694761 = 9841^2 + 5069^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122539996 and 122540023.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30635009 + ... + 30635012.

Almost surely, 2^122540042 is an apocalyptic number.

122540042 is a deficient number, since it is larger than the sum of its proper divisors (61270024).

122540042 is an equidigital number, since it uses as much as digits as its factorization.

122540042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61270023.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 122540042 is about 11069.7805759645. The cubic root of 122540042 is about 496.6983015649.

Adding to 122540042 its reverse (240045221), we get a palindrome (362585263).

The spelling of 122540042 in words is "one hundred twenty-two million, five hundred forty thousand, forty-two".