804161 has 2 divisors, whose sum is σ = 804162. Its totient is φ = 804160.

The previous prime is 804157. The next prime is 804179. The reversal of 804161 is 161408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801025 + 3136 = 895^2 + 56^2 .

It is a cyclic number.

It is not a de Polignac number, because 804161 - 2² = 804157 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (804191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402080 + 402081.

It is an arithmetic number, because the mean of its divisors is an integer number (402081).

2⁸⁰⁴¹⁶¹ is an apocalyptic number.

It is an amenable number.

804161 is a deficient number, since it is larger than the sum of its proper divisors (1).

804161 is an equidigital number, since it uses as much as digits as its factorization.

804161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 804161 is about 896.7502439364. The cubic root of 804161 is about 92.9924455266.

Adding to 804161 its reverse (161408), we get a palindrome (965569).

The spelling of 804161 in words is "eight hundred four thousand, one hundred sixty-one".