12345647 has 2 divisors, whose sum is σ = 12345648. Its totient is φ = 12345646.

The previous prime is 12345643. The next prime is 12345653. The reversal of 12345647 is 74654321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12345647 - 2² = 12345643 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12345643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172823 + 6172824.

It is an arithmetic number, because the mean of its divisors is an integer number (6172824).

Almost surely, 2^12345647 is an apocalyptic number.

12345647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345647 is an equidigital number, since it uses as much as digits as its factorization.

12345647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 32.

The square root of 12345647 is about 3513.6372891919. The cubic root of 12345647 is about 231.1202250183.

Adding to 12345647 its reverse (74654321), we get a palindrome (86999968).

The spelling of 12345647 in words is "twelve million, three hundred forty-five thousand, six hundred forty-seven".