12315647 has 2 divisors, whose sum is σ = 12315648. Its totient is φ = 12315646.

The previous prime is 12315643. The next prime is 12315659. The reversal of 12315647 is 74651321.

It is a weak prime.

It is an emirp because it is prime and its reverse (74651321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12315647 - 2² = 12315643 is a prime.

It is a super-2 number, since 2×12315647² = 303350322057218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12315643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157823 + 6157824.

It is an arithmetic number, because the mean of its divisors is an integer number (6157824).

Almost surely, 2^12315647 is an apocalyptic number.

12315647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315647 is an equidigital number, since it uses as much as digits as its factorization.

12315647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 12315647 is about 3509.3656121869. The cubic root of 12315647 is about 230.9328653068.

Adding to 12315647 its reverse (74651321), we get a palindrome (86966968).

The spelling of 12315647 in words is "twelve million, three hundred fifteen thousand, six hundred forty-seven".