12105315 has 16 divisors (see below), whose sum is σ = 21520800. Its totient is φ = 6456096.

The previous prime is 12105307. The next prime is 12105319. The reversal of 12105315 is 51350121.

It is not a de Polignac number, because 12105315 - 2³ = 12105307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12105319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44700 + ... + 44969.

It is an arithmetic number, because the mean of its divisors is an integer number (1345050).

Almost surely, 2^12105315 is an apocalyptic number.

12105315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12105315 is a deficient number, since it is larger than the sum of its proper divisors (9415485).

12105315 is an equidigital number, since it uses as much as digits as its factorization.

12105315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89683 (or 89677 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 12105315 is about 3479.2693198429. The cubic root of 12105315 is about 229.6106519256.

Adding to 12105315 its reverse (51350121), we get a palindrome (63455436).

The spelling of 12105315 in words is "twelve million, one hundred five thousand, three hundred fifteen".