42450442 has 8 divisors (see below), whose sum is σ = 63703332. Its totient is φ = 21216000.

The previous prime is 42450391. The next prime is 42450451. The reversal of 42450442 is 24405424.

It is a happy number.

42450442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40436881 + 2013561 = 6359^2 + 1419^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 6442 + ... + 11242.

Almost surely, 2^42450442 is an apocalyptic number.

42450442 is a deficient number, since it is larger than the sum of its proper divisors (21252890).

42450442 is a wasteful number, since it uses less digits than its factorization.

42450442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9224.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 42450442 is about 6515.4003714277. The cubic root of 42450442 is about 348.8409058039.

Adding to 42450442 its reverse (24405424), we get a palindrome (66855866).

The spelling of 42450442 in words is "forty-two million, four hundred fifty thousand, four hundred forty-two".