161171 has 4 divisors (see below), whose sum is σ = 165144. Its totient is φ = 157200.

The previous prime is 161167. The next prime is 161201. The reversal of 161171 is 171161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161171 - 2² = 161167 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925 + ... + 2006.

It is an arithmetic number, because the mean of its divisors is an integer number (41286).

2¹⁶¹¹⁷¹ is an apocalyptic number.

161171 is a deficient number, since it is larger than the sum of its proper divisors (3973).

161171 is an equidigital number, since it uses as much as digits as its factorization.

161171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972.

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

The square root of 161171 is about 401.4610815509. The cubic root of 161171 is about 54.4204714980.

The spelling of 161171 in words is "one hundred sixty-one thousand, one hundred seventy-one".