12280105 has 4 divisors (see below), whose sum is σ = 14736132. Its totient is φ = 9824080.

The previous prime is 12280097. The next prime is 12280109. The reversal of 12280105 is 50108221.

12280105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3916441 + 8363664 = 1979^2 + 2892^2 .

It is not a de Polignac number, because 12280105 - 2³ = 12280097 is a prime.

It is a super-2 number, since 2×12280105² = 301601957622050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12280109) 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, 1228006 + ... + 1228015.

It is an arithmetic number, because the mean of its divisors is an integer number (3684033).

Almost surely, 2^12280105 is an apocalyptic number.

It is an amenable number.

12280105 is a deficient number, since it is larger than the sum of its proper divisors (2456027).

12280105 is an equidigital number, since it uses as much as digits as its factorization.

12280105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456026.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 12280105 is about 3504.2980752213. The cubic root of 12280105 is about 230.7104998263.

Adding to 12280105 its reverse (50108221), we get a palindrome (62388326).

The spelling of 12280105 in words is "twelve million, two hundred eighty thousand, one hundred five".