204102001 has 2 divisors, whose sum is σ = 204102002. Its totient is φ = 204102000.

The previous prime is 204101987. The next prime is 204102053. The reversal of 204102001 is 100201402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201668401 + 2433600 = 14201^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 204102001 - 2⁵ = 204101969 is a prime.

It is not a weakly prime, because it can be changed into another prime (204102071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102051000 + 102051001.

It is an arithmetic number, because the mean of its divisors is an integer number (102051001).

Almost surely, 2^204102001 is an apocalyptic number.

It is an amenable number.

204102001 is a deficient number, since it is larger than the sum of its proper divisors (1).

204102001 is an equidigital number, since it uses as much as digits as its factorization.

204102001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 204102001 is about 14286.4271600705. The cubic root of 204102001 is about 588.7746290576.

Adding to 204102001 its reverse (100201402), we get a palindrome (304303403).

The spelling of 204102001 in words is "two hundred four million, one hundred two thousand, one".