42004033 has 4 divisors (see below), whose sum is σ = 42017328. Its totient is φ = 41990740.

The previous prime is 42004013. The next prime is 42004069. The reversal of 42004033 is 33040024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42004033 is a prime.

It is a super-3 number, since 3×42004033³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42003998 and 42004016.

It is not an unprimeable number, because it can be changed into a prime (42004013) 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, 1110 + ... + 9232.

It is an arithmetic number, because the mean of its divisors is an integer number (10504332).

Almost surely, 2^42004033 is an apocalyptic number.

It is an amenable number.

42004033 is a deficient number, since it is larger than the sum of its proper divisors (13295).

42004033 is an equidigital number, since it uses as much as digits as its factorization.

42004033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13294.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 42004033 is about 6481.0518436439. The cubic root of 42004033 is about 347.6137901766.

Adding to 42004033 its reverse (33040024), we get a palindrome (75044057).

The spelling of 42004033 in words is "forty-two million, four thousand, thirty-three".