42244442 has 4 divisors (see below), whose sum is σ = 63366666. Its totient is φ = 21122220.

The previous prime is 42244421. The next prime is 42244453. The reversal of 42244442 is 24444224.

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., 42003361 + 241081 = 6481^2 + 491^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561109 + ... + 10561112.

Almost surely, 2^42244442 is an apocalyptic number.

42244442 is a deficient number, since it is larger than the sum of its proper divisors (21122224).

42244442 is a wasteful number, since it uses less digits than its factorization.

42244442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21122223.

The product of its digits is 8192, while the sum is 26.

The square root of 42244442 is about 6499.5724474768. The cubic root of 42244442 is about 348.2757151302.

Adding to 42244442 its reverse (24444224), we get a palindrome (66688666).

The spelling of 42244442 in words is "forty-two million, two hundred forty-four thousand, four hundred forty-two".