42442243421 has 8 divisors (see below), whose sum is σ = 42987842304. Its totient is φ = 41900002560.

The previous prime is 42442243409. The next prime is 42442243423. The reversal of 42442243421 is 12434224424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42442243421 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 (42442243423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814061 + ... + 864626.

It is an arithmetic number, because the mean of its divisors is an integer number (5373480288).

Almost surely, 2^42442243421 is an apocalyptic number.

It is an amenable number.

42442243421 is a deficient number, since it is larger than the sum of its proper divisors (545598883).

42442243421 is a wasteful number, since it uses less digits than its factorization.

42442243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679011.

The product of its digits is 49152, while the sum is 32.

Adding to 42442243421 its reverse (12434224424), we get a palindrome (54876467845).

The spelling of 42442243421 in words is "forty-two billion, four hundred forty-two million, two hundred forty-three thousand, four hundred twenty-one".