2001004521 has 8 divisors (see below), whose sum is σ = 2683982784. Its totient is φ = 1326014640.

The previous prime is 2001004487. The next prime is 2001004547. The reversal of 2001004521 is 1254001002.

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

It is not a de Polignac number, because 2001004521 - 2⁶ = 2001004457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001004521.

It is not an unprimeable number, because it can be changed into a prime (2001004571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1996510 + ... + 1997511.

It is an arithmetic number, because the mean of its divisors is an integer number (335497848).

Almost surely, 2^2001004521 is an apocalyptic number.

It is an amenable number.

2001004521 is a deficient number, since it is larger than the sum of its proper divisors (682978263).

2001004521 is a wasteful number, since it uses less digits than its factorization.

2001004521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994191.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2001004521 is about 44732.5890263463. The cubic root of 2001004521 is about 1260.1319507819.

Adding to 2001004521 its reverse (1254001002), we get a palindrome (3255005523).

The spelling of 2001004521 in words is "two billion, one million, four thousand, five hundred twenty-one".