171422 has 4 divisors (see below), whose sum is σ = 257136. Its totient is φ = 85710.

The previous prime is 171403. The next prime is 171427. The reversal of 171422 is 224171.

171422 is nontrivially palindromic in base 3.

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

It is a self number, because there is not a number n which added to its sum of digits gives 171422.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 171422.

It is not an unprimeable number, because it can be changed into a prime (171427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42854 + ... + 42857.

It is an arithmetic number, because the mean of its divisors is an integer number (64284).

2¹⁷¹⁴²² is an apocalyptic number.

171422 is a deficient number, since it is larger than the sum of its proper divisors (85714).

171422 is an equidigital number, since it uses as much as digits as its factorization.

171422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85713.

The product of its digits is 112, while the sum is 17.

The square root of 171422 is about 414.0313997754. The cubic root of 171422 is about 55.5506125973.

Subtracting from 171422 its sum of digits (17), we obtain a triangular number (171405 = T₅₈₅).

Adding to 171422 its reverse (224171), we get a palindrome (395593).

The spelling of 171422 in words is "one hundred seventy-one thousand, four hundred twenty-two", and thus it is an iban number.