42004205 has 4 divisors (see below), whose sum is σ = 50405052. Its totient is φ = 33603360.

The previous prime is 42004177. The next prime is 42004211. The reversal of 42004205 is 50240024.

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 26020201 + 15984004 = 5101^2 + 3998^2 .

It is not a de Polignac number, because 42004205 - 2¹² = 42000109 is a prime.

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, 4200416 + ... + 4200425.

It is an arithmetic number, because the mean of its divisors is an integer number (12601263).

Almost surely, 2^42004205 is an apocalyptic number.

It is an amenable number.

42004205 is a deficient number, since it is larger than the sum of its proper divisors (8400847).

42004205 is an equidigital number, since it uses as much as digits as its factorization.

42004205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400846.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 42004205 is about 6481.0651130813. The cubic root of 42004205 is about 347.6142646508.

Adding to 42004205 its reverse (50240024), we get a palindrome (92244229).

The spelling of 42004205 in words is "forty-two million, four thousand, two hundred five".