139105 has 8 divisors (see below), whose sum is σ = 171072. Its totient is φ = 108528.

The previous prime is 139091. The next prime is 139109. The reversal of 139105 is 501931.

139105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 139105 - 2⁷ = 138977 is a prime.

It is a Duffinian number.

139105 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (139109) 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, 109 + ... + 538.

It is an arithmetic number, because the mean of its divisors is an integer number (21384).

2¹³⁹¹⁰⁵ is an apocalyptic number.

It is an amenable number.

139105 is a deficient number, since it is larger than the sum of its proper divisors (31967).

139105 is an equidigital number, since it uses as much as digits as its factorization.

139105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 139105 is about 372.9678270307. The cubic root of 139105 is about 51.8140548118.

The spelling of 139105 in words is "one hundred thirty-nine thousand, one hundred five".