42004055 has 4 divisors (see below), whose sum is σ = 50404872. Its totient is φ = 33603240.

The previous prime is 42004013. The next prime is 42004069. The reversal of 42004055 is 55040024.

It is a happy number.

42004055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42004055 - 2⁸ = 42003799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200401 + ... + 4200410.

It is an arithmetic number, because the mean of its divisors is an integer number (12601218).

Almost surely, 2^42004055 is an apocalyptic number.

42004055 is a deficient number, since it is larger than the sum of its proper divisors (8400817).

42004055 is an equidigital number, since it uses as much as digits as its factorization.

42004055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8400816.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 42004055 is about 6481.0535408990. The cubic root of 42004055 is about 347.6138508652.

Adding to 42004055 its reverse (55040024), we get a palindrome (97044079).

The spelling of 42004055 in words is "forty-two million, four thousand, fifty-five".