204001 has 8 divisors (see below), whose sum is σ = 235904. Its totient is φ = 172800.

The previous prime is 203999. The next prime is 204007. The reversal of 204001 is 100402.

204001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a 3-Lehmer number, since φ(204001) divides (204001-1)³.

It is a cyclic number.

It is not a de Polignac number, because 204001 - 2¹ = 203999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

204001 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204007) 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, 961 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (29488).

It is a Poulet number, since it divides 2²⁰⁴⁰⁰⁰-1.

2²⁰⁴⁰⁰¹ is an apocalyptic number.

It is an amenable number.

204001 is a deficient number, since it is larger than the sum of its proper divisors (31903).

204001 is a wasteful number, since it uses less digits than its factorization.

204001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 204001 is about 451.6646986427. The cubic root of 204001 is about 58.8677493577.

Adding to 204001 its reverse (100402), we get a palindrome (304403).

The spelling of 204001 in words is "two hundred four thousand, one", and thus it is an iban number.