42442042 has 4 divisors (see below), whose sum is σ = 63663066. Its totient is φ = 21221020.

The previous prime is 42442033. The next prime is 42442073. The reversal of 42442042 is 24024424.

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., 34939921 + 7502121 = 5911^2 + 2739^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610509 + ... + 10610512.

Almost surely, 2^42442042 is an apocalyptic number.

42442042 is a deficient number, since it is larger than the sum of its proper divisors (21221024).

42442042 is a wasteful number, since it uses less digits than its factorization.

42442042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21221023.

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 42442042 is about 6514.7557129949. The cubic root of 42442042 is about 348.8178949959.

Adding to 42442042 its reverse (24024424), we get a palindrome (66466466).

The spelling of 42442042 in words is "forty-two million, four hundred forty-two thousand, forty-two".