42421413421 has 8 divisors (see below), whose sum is σ = 43792487424. Its totient is φ = 41050504560.

The previous prime is 42421413407. The next prime is 42421413473. The reversal of 42421413421 is 12431412424.

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

It is a cyclic number.

It is not a de Polignac number, because 42421413421 - 2⁵ = 42421413389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42421413421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421413521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682380 + ... + 741946.

It is an arithmetic number, because the mean of its divisors is an integer number (5474060928).

Almost surely, 2^42421413421 is an apocalyptic number.

It is an amenable number.

42421413421 is a deficient number, since it is larger than the sum of its proper divisors (1371074003).

42421413421 is a wasteful number, since it uses less digits than its factorization.

42421413421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82571.

The product of its digits is 6144, while the sum is 28.

Adding to 42421413421 its reverse (12431412424), we get a palindrome (54852825845).

The spelling of 42421413421 in words is "forty-two billion, four hundred twenty-one million, four hundred thirteen thousand, four hundred twenty-one".