12897646 has 8 divisors (see below), whose sum is σ = 19758240. Its totient is φ = 6311568.

The previous prime is 12897631. The next prime is 12897649. The reversal of 12897646 is 64679821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12897649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68511 + ... + 68698.

It is an arithmetic number, because the mean of its divisors is an integer number (2469780).

Almost surely, 2^12897646 is an apocalyptic number.

12897646 is a deficient number, since it is larger than the sum of its proper divisors (6860594).

12897646 is a wasteful number, since it uses less digits than its factorization.

12897646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137258.

The product of its digits is 145152, while the sum is 43.

The square root of 12897646 is about 3591.3292803640. The cubic root of 12897646 is about 234.5147433535.

The spelling of 12897646 in words is "twelve million, eight hundred ninety-seven thousand, six hundred forty-six".