42422421 has 8 divisors (see below), whose sum is σ = 59540320. Its totient is φ = 26793072.

The previous prime is 42422411. The next prime is 42422423. The reversal of 42422421 is 12422424.

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

It is not a de Polignac number, because 42422421 - 2¹⁸ = 42160277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42422423) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 372070 + ... + 372183.

It is an arithmetic number, because the mean of its divisors is an integer number (7442540).

Almost surely, 2^42422421 is an apocalyptic number.

It is an amenable number.

42422421 is a deficient number, since it is larger than the sum of its proper divisors (17117899).

42422421 is a wasteful number, since it uses less digits than its factorization.

42422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744275.

The product of its digits is 1024, while the sum is 21.

The square root of 42422421 is about 6513.2496497524. The cubic root of 42422421 is about 348.7641337523.

Adding to 42422421 its reverse (12422424), we get a palindrome (54844845).

The spelling of 42422421 in words is "forty-two million, four hundred twenty-two thousand, four hundred twenty-one".