12975647 has 4 divisors (see below), whose sum is σ = 12987816. Its totient is φ = 12963480.

The previous prime is 12975643. The next prime is 12975649. The reversal of 12975647 is 74657921.

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

It is a cyclic number.

It is not a de Polignac number, because 12975647 - 2² = 12975643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12975643) 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, 4313 + ... + 6674.

It is an arithmetic number, because the mean of its divisors is an integer number (3246954).

Almost surely, 2^12975647 is an apocalyptic number.

12975647 is a deficient number, since it is larger than the sum of its proper divisors (12169).

12975647 is a wasteful number, since it uses less digits than its factorization.

12975647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12168.

The product of its digits is 105840, while the sum is 41.

The square root of 12975647 is about 3602.1725388993. The cubic root of 12975647 is about 234.9865512147.

The spelling of 12975647 in words is "twelve million, nine hundred seventy-five thousand, six hundred forty-seven".