2160161 has 2 divisors, whose sum is σ = 2160162. Its totient is φ = 2160160.

The previous prime is 2160149. The next prime is 2160203. The reversal of 2160161 is 1610612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2131600 + 28561 = 1460^2 + 169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2160161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2160101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080080 + 1080081.

It is an arithmetic number, because the mean of its divisors is an integer number (1080081).

2^2160161 is an apocalyptic number.

It is an amenable number.

2160161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2160161 is an equidigital number, since it uses as much as digits as its factorization.

2160161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2160161 is about 1469.7486179616. The cubic root of 2160161 is about 129.2692930257.

Adding to 2160161 its reverse (1610612), we get a palindrome (3770773).

The spelling of 2160161 in words is "two million, one hundred sixty thousand, one hundred sixty-one".