42004533 has 8 divisors (see below), whose sum is σ = 56550208. Its totient is φ = 27730944.

The previous prime is 42004531. The next prime is 42004553. The reversal of 42004533 is 33540024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42004533 - 2¹ = 42004531 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67660 + ... + 68277.

It is an arithmetic number, because the mean of its divisors is an integer number (7068776).

Almost surely, 2^42004533 is an apocalyptic number.

It is an amenable number.

42004533 is a deficient number, since it is larger than the sum of its proper divisors (14545675).

42004533 is a wasteful number, since it uses less digits than its factorization.

42004533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136043.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 42004533 is about 6481.0904175146. The cubic root of 42004533 is about 347.6151694584.

Adding to 42004533 its reverse (33540024), we get a palindrome (75544557).

The spelling of 42004533 in words is "forty-two million, four thousand, five hundred thirty-three".