12681318 has 32 divisors (see below), whose sum is σ = 27449856. Its totient is φ = 3882528.

The previous prime is 12681307. The next prime is 12681329. The reversal of 12681318 is 81318621.

It is an interprime number because it is at equal distance from previous prime (12681307) and next prime (12681329).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28405 + ... + 28847.

It is an arithmetic number, because the mean of its divisors is an integer number (857808).

Almost surely, 2^12681318 is an apocalyptic number.

12681318 is an abundant number, since it is smaller than the sum of its proper divisors (14768538).

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

12681318 is a wasteful number, since it uses less digits than its factorization.

12681318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its digits is 2304, while the sum is 30.

The square root of 12681318 is about 3561.0838237817. The cubic root of 12681318 is about 233.1961974221.

Adding to 12681318 its reverse (81318621), we get a palindrome (93999939).

The spelling of 12681318 in words is "twelve million, six hundred eighty-one thousand, three hundred eighteen".