171642 has 8 divisors (see below), whose sum is σ = 343296. Its totient is φ = 57212.

The previous prime is 171641. The next prime is 171653. The reversal of 171642 is 246171.

It is a sphenic number, since it is the product of 3 distinct primes.

171642 is an admirable number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (171641) 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 in 3 ways as a sum of consecutive naturals, for example, 14298 + ... + 14309.

It is an arithmetic number, because the mean of its divisors is an integer number (42912).

2¹⁷¹⁶⁴² is an apocalyptic number.

171642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171642 is a wasteful number, since it uses less digits than its factorization.

171642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28612.

The product of its digits is 336, while the sum is 21.

The square root of 171642 is about 414.2969949203. The cubic root of 171642 is about 55.5743666669.

Subtracting 171642 from its reverse (246171), we obtain a square (74529 = 273²).

The spelling of 171642 in words is "one hundred seventy-one thousand, six hundred forty-two".