42004051 has 4 divisors (see below), whose sum is σ = 42692704. Its totient is φ = 41315400.

The previous prime is 42004013. The next prime is 42004069. The reversal of 42004051 is 15040024.

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

It is a cyclic number.

It is not a de Polignac number, because 42004051 - 2⁹ = 42003539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42004451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344235 + ... + 344356.

It is an arithmetic number, because the mean of its divisors is an integer number (10673176).

Almost surely, 2^42004051 is an apocalyptic number.

42004051 is a deficient number, since it is larger than the sum of its proper divisors (688653).

42004051 is an equidigital number, since it uses as much as digits as its factorization.

42004051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688652.

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

The square root of 42004051 is about 6481.0532323072. The cubic root of 42004051 is about 347.6138398309.

Adding to 42004051 its reverse (15040024), we get a palindrome (57044075).

The spelling of 42004051 in words is "forty-two million, four thousand, fifty-one".