139171 has 4 divisors (see below), whose sum is σ = 144000. Its totient is φ = 134344.

The previous prime is 139169. The next prime is 139177. The reversal of 139171 is 171931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 171931 = 19 ⋅9049.

It is a cyclic number.

It is not a de Polignac number, because 139171 - 2¹ = 139169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2371 + ... + 2428.

It is an arithmetic number, because the mean of its divisors is an integer number (36000).

2¹³⁹¹⁷¹ is an apocalyptic number.

139171 is a deficient number, since it is larger than the sum of its proper divisors (4829).

139171 is an equidigital number, since it uses as much as digits as its factorization.

139171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828.

The product of its digits is 189, while the sum is 22.

The square root of 139171 is about 373.0562960198. The cubic root of 139171 is about 51.8222481117.

The spelling of 139171 in words is "one hundred thirty-nine thousand, one hundred seventy-one".