42342304421 has 4 divisors (see below), whose sum is σ = 42358124172. Its totient is φ = 42326484672.

The previous prime is 42342304393. The next prime is 42342304439. The reversal of 42342304421 is 12440324324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9635581921 + 32706722500 = 98161^2 + 180850^2 .

It is a cyclic number.

It is not a de Polignac number, because 42342304421 - 2¹⁰ = 42342303397 is a prime.

It is a super-2 number, since 2×42342304421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42342304471) 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 3 ways as a sum of consecutive naturals, for example, 7905860 + ... + 7911213.

It is an arithmetic number, because the mean of its divisors is an integer number (10589531043).

Almost surely, 2^42342304421 is an apocalyptic number.

It is an amenable number.

42342304421 is a deficient number, since it is larger than the sum of its proper divisors (15819751).

42342304421 is a wasteful number, since it uses less digits than its factorization.

42342304421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15819750.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42342304421 its reverse (12440324324), we get a palindrome (54782628745).

The spelling of 42342304421 in words is "forty-two billion, three hundred forty-two million, three hundred four thousand, four hundred twenty-one".