12563647 has 4 divisors (see below), whose sum is σ = 12588840. Its totient is φ = 12538456.

The previous prime is 12563591. The next prime is 12563669. The reversal of 12563647 is 74636521.

It is a happy number.

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 12563647 - 2¹¹ = 12561599 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 (12563687) 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, 11833 + ... + 12850.

It is an arithmetic number, because the mean of its divisors is an integer number (3147210).

Almost surely, 2^12563647 is an apocalyptic number.

12563647 is a deficient number, since it is larger than the sum of its proper divisors (25193).

12563647 is an equidigital number, since it uses as much as digits as its factorization.

12563647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25192.

The product of its digits is 30240, while the sum is 34.

The square root of 12563647 is about 3544.5235222805. The cubic root of 12563647 is about 232.4726726274.

The spelling of 12563647 in words is "twelve million, five hundred sixty-three thousand, six hundred forty-seven".