12125105 has 4 divisors (see below), whose sum is σ = 14550132. Its totient is φ = 9700080.

The previous prime is 12125101. The next prime is 12125129. The reversal of 12125105 is 50152121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50152121 = 23 ⋅2180527.

It can be written as a sum of positive squares in 2 ways, for example, as 4661281 + 7463824 = 2159^2 + 2732^2 .

It is not a de Polignac number, because 12125105 - 2² = 12125101 is a prime.

It is a super-2 number, since 2×12125105² = 294036342522050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12125101) 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 3 ways as a sum of consecutive naturals, for example, 1212506 + ... + 1212515.

It is an arithmetic number, because the mean of its divisors is an integer number (3637533).

Almost surely, 2^12125105 is an apocalyptic number.

It is an amenable number.

12125105 is a deficient number, since it is larger than the sum of its proper divisors (2425027).

12125105 is an equidigital number, since it uses as much as digits as its factorization.

12125105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425026.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 12125105 is about 3482.1121463847. The cubic root of 12125105 is about 229.7357077611.

Adding to 12125105 its reverse (50152121), we get a palindrome (62277226).

The spelling of 12125105 in words is "twelve million, one hundred twenty-five thousand, one hundred five".