139165 has 8 divisors (see below), whose sum is σ = 179928. Its totient is φ = 102720.

The previous prime is 139133. The next prime is 139169. The reversal of 139165 is 561931.

It can be written as a sum of positive squares in 4 ways, for example, as 22201 + 116964 = 149^2 + 342^2 .

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

It is not a de Polignac number, because 139165 - 2⁵ = 139133 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139169) 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 7 ways as a sum of consecutive naturals, for example, 1006 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (22491).

2¹³⁹¹⁶⁵ is an apocalyptic number.

It is an amenable number.

139165 is a deficient number, since it is larger than the sum of its proper divisors (40763).

139165 is a wasteful number, since it uses less digits than its factorization.

139165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159.

The product of its digits is 810, while the sum is 25.

The square root of 139165 is about 373.0482542514. The cubic root of 139165 is about 51.8215033733.

The spelling of 139165 in words is "one hundred thirty-nine thousand, one hundred sixty-five".