171138 has 16 divisors (see below), whose sum is σ = 373536. Its totient is φ = 51840.

The previous prime is 171131. The next prime is 171161. The reversal of 171138 is 831171.

It is not an unprimeable number, because it can be changed into a prime (171131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231 + ... + 1362.

It is an arithmetic number, because the mean of its divisors is an integer number (23346).

2¹⁷¹¹³⁸ is an apocalyptic number.

171138 is an abundant number, since it is smaller than the sum of its proper divisors (202398).

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

171138 is a wasteful number, since it uses less digits than its factorization.

171138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609.

The product of its digits is 168, while the sum is 21.

The square root of 171138 is about 413.6882884492. The cubic root of 171138 is about 55.5199181815.

The spelling of 171138 in words is "one hundred seventy-one thousand, one hundred thirty-eight".