12123315 has 24 divisors (see below), whose sum is σ = 21332688. Its totient is φ = 6367680.

The previous prime is 12123299. The next prime is 12123317. The reversal of 12123315 is 51332121.

12123315 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12123315 - 2⁴ = 12123299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12123317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1005 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (888862).

Almost surely, 2^12123315 is an apocalyptic number.

12123315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12123315 is a deficient number, since it is larger than the sum of its proper divisors (9209373).

12123315 is a wasteful number, since it uses less digits than its factorization.

12123315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099 (or 4096 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 12123315 is about 3481.8551089900. The cubic root of 12123315 is about 229.7244020953.

Adding to 12123315 its reverse (51332121), we get a palindrome (63455436).

It can be divided in two parts, 121 and 23315, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 12123315 in words is "twelve million, one hundred twenty-three thousand, three hundred fifteen".