42004442 has 16 divisors (see below), whose sum is σ = 65297664. Its totient is φ = 20244000.

The previous prime is 42004439. The next prime is 42004451. The reversal of 42004442 is 24440024.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16217 + ... + 18627.

It is an arithmetic number, because the mean of its divisors is an integer number (4081104).

Almost surely, 2^42004442 is an apocalyptic number.

42004442 is a deficient number, since it is larger than the sum of its proper divisors (23293222).

42004442 is a wasteful number, since it uses less digits than its factorization.

42004442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 42004442 is about 6481.0833970872. The cubic root of 42004442 is about 347.6149184300.

Adding to 42004442 its reverse (24440024), we get a palindrome (66444466).

The spelling of 42004442 in words is "forty-two million, four thousand, four hundred forty-two".