171261 has 8 divisors (see below), whose sum is σ = 253760. Its totient is φ = 114156.

The previous prime is 171253. The next prime is 171263. The reversal of 171261 is 162171.

It is not a de Polignac number, because 171261 - 2³ = 171253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3145 + ... + 3198.

It is an arithmetic number, because the mean of its divisors is an integer number (31720).

2¹⁷¹²⁶¹ is an apocalyptic number.

It is an amenable number.

171261 is a deficient number, since it is larger than the sum of its proper divisors (82499).

171261 is an equidigital number, since it uses as much as digits as its factorization.

171261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6352 (or 6346 counting only the distinct ones).

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

The square root of 171261 is about 413.8369244038. The cubic root of 171261 is about 55.5332160553.

The spelling of 171261 in words is "one hundred seventy-one thousand, two hundred sixty-one".