138170 has 16 divisors (see below), whose sum is σ = 255528. Its totient is φ = 53760.

The previous prime is 138163. The next prime is 138179. The reversal of 138170 is 71831.

It can be written as a sum of positive squares in 4 ways, for example, as 58081 + 80089 = 241^2 + 283^2 .

It is not an unprimeable number, because it can be changed into a prime (138179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242 + ... + 578.

2¹³⁸¹⁷⁰ is an apocalyptic number.

138170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138170 is a deficient number, since it is larger than the sum of its proper divisors (117358).

138170 is a wasteful number, since it uses less digits than its factorization.

138170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 138170 is about 371.7122543043. The cubic root of 138170 is about 51.6977036319.

The spelling of 138170 in words is "one hundred thirty-eight thousand, one hundred seventy".