40605161 has 2 divisors, whose sum is σ = 40605162. Its totient is φ = 40605160.

The previous prime is 40605151. The next prime is 40605181. The reversal of 40605161 is 16150604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25050025 + 15555136 = 5005^2 + 3944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40605161 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40605151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20302580 + 20302581.

It is an arithmetic number, because the mean of its divisors is an integer number (20302581).

Almost surely, 2^40605161 is an apocalyptic number.

It is an amenable number.

40605161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40605161 is an equidigital number, since it uses as much as digits as its factorization.

40605161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40605161 is about 6372.2179027400. The cubic root of 40605161 is about 343.7112487006.

Adding to 40605161 its reverse (16150604), we get a palindrome (56755765).

The spelling of 40605161 in words is "forty million, six hundred five thousand, one hundred sixty-one".