204042401 has 4 divisors (see below), whose sum is σ = 204330900. Its totient is φ = 203753904.

The previous prime is 204042389. The next prime is 204042431. The reversal of 204042401 is 104240402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108472225 + 95570176 = 10415^2 + 9776^2 .

It is a cyclic number.

It is not a de Polignac number, because 204042401 - 2⁶ = 204042337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204042401.

It is not an unprimeable number, because it can be changed into a prime (204042431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143186 + ... + 144603.

It is an arithmetic number, because the mean of its divisors is an integer number (51082725).

Almost surely, 2^204042401 is an apocalyptic number.

It is an amenable number.

204042401 is a deficient number, since it is larger than the sum of its proper divisors (288499).

204042401 is an equidigital number, since it uses as much as digits as its factorization.

204042401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288498.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 204042401 is about 14284.3411118609. The cubic root of 204042401 is about 588.7173139506.

Adding to 204042401 its reverse (104240402), we get a palindrome (308282803).

The spelling of 204042401 in words is "two hundred four million, forty-two thousand, four hundred one".