171161 has 2 divisors, whose sum is σ = 171162. Its totient is φ = 171160.

The previous prime is 171131. The next prime is 171163. The reversal of 171161 is 161171.

171161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105625 + 65536 = 325^2 + 256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171161 is a prime.

Together with 171163, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (171163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85580 + 85581.

It is an arithmetic number, because the mean of its divisors is an integer number (85581).

2¹⁷¹¹⁶¹ is an apocalyptic number.

It is an amenable number.

171161 is a deficient number, since it is larger than the sum of its proper divisors (1).

171161 is an equidigital number, since it uses as much as digits as its factorization.

171161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42, while the sum is 17.

The square root of 171161 is about 413.7160862234. The cubic root of 171161 is about 55.5224052600.

The spelling of 171161 in words is "one hundred seventy-one thousand, one hundred sixty-one".