42104005 has 4 divisors (see below), whose sum is σ = 50524812. Its totient is φ = 33683200.

The previous prime is 42104003. The next prime is 42104011. The reversal of 42104005 is 50040124.

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 18610596 + 23493409 = 4314^2 + 4847^2 .

It is not a de Polignac number, because 42104005 - 2¹ = 42104003 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 42104005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42104003) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4210396 + ... + 4210405.

It is an arithmetic number, because the mean of its divisors is an integer number (12631203).

Almost surely, 2^42104005 is an apocalyptic number.

It is an amenable number.

42104005 is a deficient number, since it is larger than the sum of its proper divisors (8420807).

42104005 is an equidigital number, since it uses as much as digits as its factorization.

42104005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8420806.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 42104005 is about 6488.7598969295. The cubic root of 42104005 is about 347.8893519060.

Adding to 42104005 its reverse (50040124), we get a palindrome (92144129).

The spelling of 42104005 in words is "forty-two million, one hundred four thousand, five".