42420242 has 8 divisors (see below), whose sum is σ = 63960636. Its totient is φ = 21100032.

The previous prime is 42420239. The next prime is 42420251. The reversal of 42420242 is 24202424.

It can be written as a sum of positive squares in 2 ways, for example, as 39075001 + 3345241 = 6251^2 + 1829^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54563 + ... + 55334.

Almost surely, 2^42420242 is an apocalyptic number.

42420242 is a deficient number, since it is larger than the sum of its proper divisors (21540394).

42420242 is a wasteful number, since it uses less digits than its factorization.

42420242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110092.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 42420242 is about 6513.0823731932. The cubic root of 42420242 is about 348.7581623026.

Adding to 42420242 its reverse (24202424), we get a palindrome (66622666).

The spelling of 42420242 in words is "forty-two million, four hundred twenty thousand, two hundred forty-two".