12105645 has 16 divisors (see below), whose sum is σ = 19412352. Its totient is φ = 6441920.

The previous prime is 12105637. The next prime is 12105647. The reversal of 12105645 is 54650121.

It is not a de Polignac number, because 12105645 - 2³ = 12105637 is a prime.

It is a super-3 number, since 3×12105645³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11824 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (1213272).

Almost surely, 2^12105645 is an apocalyptic number.

12105645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12105645 is a deficient number, since it is larger than the sum of its proper divisors (7306707).

12105645 is an equidigital number, since it uses as much as digits as its factorization.

12105645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12105645 is about 3479.3167432701. The cubic root of 12105645 is about 229.6127383597.

Adding to 12105645 its reverse (54650121), we get a palindrome (66755766).

The spelling of 12105645 in words is "twelve million, one hundred five thousand, six hundred forty-five".