12972647 has 4 divisors (see below), whose sum is σ = 13038696. Its totient is φ = 12906600.

The previous prime is 12972637. The next prime is 12972671. The reversal of 12972647 is 74627921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74627921 = 6379 ⋅11699.

It is a cyclic number.

It is not a de Polignac number, because 12972647 - 2¹² = 12968551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12972647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12972637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32729 + ... + 33122.

It is an arithmetic number, because the mean of its divisors is an integer number (3259674).

Almost surely, 2^12972647 is an apocalyptic number.

12972647 is a deficient number, since it is larger than the sum of its proper divisors (66049).

12972647 is an equidigital number, since it uses as much as digits as its factorization.

12972647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66048.

The product of its digits is 42336, while the sum is 38.

The square root of 12972647 is about 3601.7560994604. The cubic root of 12972647 is about 234.9684400050.

The spelling of 12972647 in words is "twelve million, nine hundred seventy-two thousand, six hundred forty-seven".