161271 has 20 divisors (see below), whose sum is σ = 264264. Its totient is φ = 97200.

The previous prime is 161267. The next prime is 161281. The reversal of 161271 is 172161.

It is not a de Polignac number, because 161271 - 2² = 161267 is a prime.

161271 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 801 + ... + 981.

2¹⁶¹²⁷¹ is an apocalyptic number.

161271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161271 is a deficient number, since it is larger than the sum of its proper divisors (102993).

161271 is a wasteful number, since it uses less digits than its factorization.

161271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 195 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 161271 is about 401.5856073118. The cubic root of 161271 is about 54.4317243951.

The spelling of 161271 in words is "one hundred sixty-one thousand, two hundred seventy-one".