172871 has 2 divisors, whose sum is σ = 172872. Its totient is φ = 172870.

The previous prime is 172867. The next prime is 172877. The reversal of 172871 is 178271.

172871 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 is a cyclic number.

It is not a de Polignac number, because 172871 - 2² = 172867 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 172871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86435 + 86436.

It is an arithmetic number, because the mean of its divisors is an integer number (86436).

2¹⁷²⁸⁷¹ is an apocalyptic number.

172871 is a deficient number, since it is larger than the sum of its proper divisors (1).

172871 is an equidigital number, since it uses as much as digits as its factorization.

172871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 784, while the sum is 26.

The square root of 172871 is about 415.7775847734. Note that the first 3 decimals coincide. The cubic root of 172871 is about 55.7066934960.

The spelling of 172871 in words is "one hundred seventy-two thousand, eight hundred seventy-one".