1604205101 has 2 divisors, whose sum is σ = 1604205102. Its totient is φ = 1604205100.

The previous prime is 1604205061. The next prime is 1604205107. The reversal of 1604205101 is 1015024061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1604082601 + 122500 = 40051^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604205101 - 2⁶ = 1604205037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604205107) 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 as a sum of consecutive naturals, namely, 802102550 + 802102551.

It is an arithmetic number, because the mean of its divisors is an integer number (802102551).

Almost surely, 2^1604205101 is an apocalyptic number.

It is an amenable number.

1604205101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604205101 is an equidigital number, since it uses as much as digits as its factorization.

1604205101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1604205101 is about 40052.5292709462. The cubic root of 1604205101 is about 1170.6308480962.

Adding to 1604205101 its reverse (1015024061), we get a palindrome (2619229162).

The spelling of 1604205101 in words is "one billion, six hundred four million, two hundred five thousand, one hundred one".