42016421405 has 8 divisors (see below), whose sum is σ = 57622520832. Its totient is φ = 28811260368.

The previous prime is 42016421401. The next prime is 42016421443. The reversal of 42016421405 is 50412461024.

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 42016421405 - 2² = 42016421401 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 (42016421401) 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, 600234557 + ... + 600234626.

It is an arithmetic number, because the mean of its divisors is an integer number (7202815104).

Almost surely, 2^42016421405 is an apocalyptic number.

It is an amenable number.

42016421405 is a deficient number, since it is larger than the sum of its proper divisors (15606099427).

42016421405 is a wasteful number, since it uses less digits than its factorization.

42016421405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200469195.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 42016421405 its reverse (50412461024), we get a palindrome (92428882429).

The spelling of 42016421405 in words is "forty-two billion, sixteen million, four hundred twenty-one thousand, four hundred five".