105105139 has 4 divisors (see below), whose sum is σ = 105127360. Its totient is φ = 105082920.

The previous prime is 105105109. The next prime is 105105163. The reversal of 105105139 is 931501501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105105139 - 2⁵ = 105105107 is a prime.

It is a super-2 number, since 2×105105139² = 22094180488418642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105105109) 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, 867 + ... + 14524.

It is an arithmetic number, because the mean of its divisors is an integer number (26281840).

Almost surely, 2^105105139 is an apocalyptic number.

105105139 is a deficient number, since it is larger than the sum of its proper divisors (22221).

105105139 is an equidigital number, since it uses as much as digits as its factorization.

105105139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22220.

The product of its (nonzero) digits is 675, while the sum is 25.

The square root of 105105139 is about 10252.0797402283. The cubic root of 105105139 is about 471.9268101468.

The spelling of 105105139 in words is "one hundred five million, one hundred five thousand, one hundred thirty-nine".