42504321 has 8 divisors (see below), whose sum is σ = 56788000. Its totient is φ = 28278432.

The previous prime is 42504313. The next prime is 42504337. The reversal of 42504321 is 12340524.

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

It is not a de Polignac number, because 42504321 - 2³ = 42504313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42504821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12700 + ... + 15693.

It is an arithmetic number, because the mean of its divisors is an integer number (7098500).

Almost surely, 2^42504321 is an apocalyptic number.

It is an amenable number.

42504321 is a deficient number, since it is larger than the sum of its proper divisors (14283679).

42504321 is a wasteful number, since it uses less digits than its factorization.

42504321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28895.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42504321 is about 6519.5338023512. The cubic root of 42504321 is about 348.9884288301.

Adding to 42504321 its reverse (12340524), we get a palindrome (54844845).

The spelling of 42504321 in words is "forty-two million, five hundred four thousand, three hundred twenty-one".