42405321005 has 4 divisors (see below), whose sum is σ = 50886385212. Its totient is φ = 33924256800.

The previous prime is 42405320857. The next prime is 42405321059. The reversal of 42405321005 is 50012350424.

It is a happy number.

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 31890459241 + 10514861764 = 178579^2 + 102542^2 .

It is not a de Polignac number, because 42405321005 - 2²⁴ = 42388543789 is a prime.

It is a super-2 number, since 2×42405321005² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4240532096 + ... + 4240532105.

It is an arithmetic number, because the mean of its divisors is an integer number (12721596303).

Almost surely, 2^42405321005 is an apocalyptic number.

It is an amenable number.

42405321005 is a deficient number, since it is larger than the sum of its proper divisors (8481064207).

42405321005 is an equidigital number, since it uses as much as digits as its factorization.

42405321005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8481064206.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 42405321005 its reverse (50012350424), we get a palindrome (92417671429).

The spelling of 42405321005 in words is "forty-two billion, four hundred five million, three hundred twenty-one thousand, five".