1004042521 has 8 divisors (see below), whose sum is σ = 1018044800. Its totient is φ = 990072720.

The previous prime is 1004042509. The next prime is 1004042531. The reversal of 1004042521 is 1252404001.

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

It is a cyclic number.

It is not a de Polignac number, because 1004042521 - 2⁷ = 1004042393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1004042531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57826 + ... + 73156.

It is an arithmetic number, because the mean of its divisors is an integer number (127255600).

Almost surely, 2^1004042521 is an apocalyptic number.

It is an amenable number.

1004042521 is a deficient number, since it is larger than the sum of its proper divisors (14002279).

1004042521 is an equidigital number, since it uses as much as digits as its factorization.

1004042521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16239.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1004042521 is about 31686.6300038360. The cubic root of 1004042521 is about 1001.3456952919.

Adding to 1004042521 its reverse (1252404001), we get a palindrome (2256446522).

The spelling of 1004042521 in words is "one billion, four million, forty-two thousand, five hundred twenty-one".