42000005 has 8 divisors (see below), whose sum is σ = 50481792. Its totient is φ = 33545488.

The previous prime is 41999987. The next prime is 42000011. The reversal of 42000005 is 50000024.

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 42000005 - 2¹⁴ = 41983621 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 42000005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3257 + ... + 9726.

It is an arithmetic number, because the mean of its divisors is an integer number (6310224).

Almost surely, 2^42000005 is an apocalyptic number.

It is an amenable number.

42000005 is a deficient number, since it is larger than the sum of its proper divisors (8481787).

42000005 is a wasteful number, since it uses less digits than its factorization.

42000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13635.

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 42000005 is about 6480.7410841662. The cubic root of 42000005 is about 347.6026782824.

Adding to 42000005 its reverse (50000024), we get a palindrome (92000029).

The spelling of 42000005 in words is "forty-two million, five", and thus it is an aban number and an uban number.