12897647 has 8 divisors (see below), whose sum is σ = 14948352. Its totient is φ = 10899000.

The previous prime is 12897631. The next prime is 12897649. The reversal of 12897647 is 74679821.

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

It is not a de Polignac number, because 12897647 - 2⁴ = 12897631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12897598 and 12897607.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12479 + ... + 13472.

It is an arithmetic number, because the mean of its divisors is an integer number (1868544).

Almost surely, 2^12897647 is an apocalyptic number.

12897647 is a deficient number, since it is larger than the sum of its proper divisors (2050705).

12897647 is an equidigital number, since it uses as much as digits as its factorization.

12897647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26029.

The product of its digits is 169344, while the sum is 44.

The square root of 12897647 is about 3591.3294195882. The cubic root of 12897647 is about 234.5147494144.

The spelling of 12897647 in words is "twelve million, eight hundred ninety-seven thousand, six hundred forty-seven".