404120161 has 2 divisors, whose sum is σ = 404120162. Its totient is φ = 404120160.

The previous prime is 404120153. The next prime is 404120183. The reversal of 404120161 is 161021404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353440000 + 50680161 = 18800^2 + 7119^2 .

It is a cyclic number.

It is not a de Polignac number, because 404120161 - 2³ = 404120153 is a prime.

It is not a weakly prime, because it can be changed into another prime (404120131) 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 as a sum of consecutive naturals, namely, 202060080 + 202060081.

It is an arithmetic number, because the mean of its divisors is an integer number (202060081).

Almost surely, 2^404120161 is an apocalyptic number.

It is an amenable number.

404120161 is a deficient number, since it is larger than the sum of its proper divisors (1).

404120161 is an equidigital number, since it uses as much as digits as its factorization.

404120161 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 19.

The square root of 404120161 is about 20102.7401366082. The cubic root of 404120161 is about 739.3274635906.

Adding to 404120161 its reverse (161021404), we get a palindrome (565141565).

The spelling of 404120161 in words is "four hundred four million, one hundred twenty thousand, one hundred sixty-one".