12315123 has 12 divisors (see below), whose sum is σ = 18835128. Its totient is φ = 7727040.

The previous prime is 12315113. The next prime is 12315131. The reversal of 12315123 is 32151321.

It is not a de Polignac number, because 12315123 - 2¹² = 12311027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12315096 and 12315105.

It is not an unprimeable number, because it can be changed into a prime (12315103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40093 + ... + 40398.

It is an arithmetic number, because the mean of its divisors is an integer number (1569594).

Almost surely, 2^12315123 is an apocalyptic number.

12315123 is a deficient number, since it is larger than the sum of its proper divisors (6520005).

12315123 is a wasteful number, since it uses less digits than its factorization.

12315123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80514 (or 80511 counting only the distinct ones).

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

The square root of 12315123 is about 3509.2909540248. The cubic root of 12315123 is about 230.9295900549.

Adding to 12315123 its reverse (32151321), we get a palindrome (44466444).

The spelling of 12315123 in words is "twelve million, three hundred fifteen thousand, one hundred twenty-three".