12681338 has 4 divisors (see below), whose sum is σ = 19022010. Its totient is φ = 6340668.

The previous prime is 12681329. The next prime is 12681353. The reversal of 12681338 is 83318621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10452289 + 2229049 = 3233^2 + 1493^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3170333 + ... + 3170336.

Almost surely, 2^12681338 is an apocalyptic number.

12681338 is a deficient number, since it is larger than the sum of its proper divisors (6340672).

12681338 is an equidigital number, since it uses as much as digits as its factorization.

12681338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340671.

The product of its digits is 6912, while the sum is 32.

The square root of 12681338 is about 3561.0866319145. The cubic root of 12681338 is about 233.1963200151.

Adding to 12681338 its reverse (83318621), we get a palindrome (95999959).

The spelling of 12681338 in words is "twelve million, six hundred eighty-one thousand, three hundred thirty-eight".