12306138 has 16 divisors (see below), whose sum is σ = 26505696. Its totient is φ = 3786480.

The previous prime is 12306137. The next prime is 12306139. The reversal of 12306138 is 83160321.

It is an interprime number because it is at equal distance from previous prime (12306137) and next prime (12306139).

It is not an unprimeable number, because it can be changed into a prime (12306137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78808 + ... + 78963.

It is an arithmetic number, because the mean of its divisors is an integer number (1656606).

Almost surely, 2^12306138 is an apocalyptic number.

12306138 is an abundant number, since it is smaller than the sum of its proper divisors (14199558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12306138 is a wasteful number, since it uses less digits than its factorization.

12306138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157789.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12306138 is about 3508.0105473046. The cubic root of 12306138 is about 230.8734150257.

Adding to 12306138 its reverse (83160321), we get a palindrome (95466459).

The spelling of 12306138 in words is "twelve million, three hundred six thousand, one hundred thirty-eight".