12681346 has 4 divisors (see below), whose sum is σ = 19022022. Its totient is φ = 6340672.

The previous prime is 12681329. The next prime is 12681353. The reversal of 12681346 is 64318621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64318621 = 73 ⋅881077.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 625 = 3561^2 + 25^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3170335 + ... + 3170338.

Almost surely, 2^12681346 is an apocalyptic number.

12681346 is a deficient number, since it is larger than the sum of its proper divisors (6340676).

12681346 is an equidigital number, since it uses as much as digits as its factorization.

12681346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340675.

The product of its digits is 6912, while the sum is 31.

The square root of 12681346 is about 3561.0877551670. The cubic root of 12681346 is about 233.1963690522.

Adding to 12681346 its reverse (64318621), we get a palindrome (76999967).

The spelling of 12681346 in words is "twelve million, six hundred eighty-one thousand, three hundred forty-six".