158161 has 2 divisors, whose sum is σ = 158162. Its totient is φ = 158160.

The previous prime is 158143. The next prime is 158189. The reversal of 158161 is 161851.

158161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129600 + 28561 = 360^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 158161 - 2⁵ = 158129 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (158141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79080 + 79081.

It is an arithmetic number, because the mean of its divisors is an integer number (79081).

2¹⁵⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

158161 is a deficient number, since it is larger than the sum of its proper divisors (1).

158161 is an equidigital number, since it uses as much as digits as its factorization.

158161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

The square root of 158161 is about 397.6946064507. The cubic root of 158161 is about 54.0795580840.

The spelling of 158161 in words is "one hundred fifty-eight thousand, one hundred sixty-one".