12506447 has 2 divisors, whose sum is σ = 12506448. Its totient is φ = 12506446.

The previous prime is 12506401. The next prime is 12506449. The reversal of 12506447 is 74460521.

It is a strong prime.

It is an emirp because it is prime and its reverse (74460521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12506447 - 2⁶ = 12506383 is a prime.

It is a super-2 number, since 2×12506447² = 312822433127618, which contains 22 as substring.

Together with 12506449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12506449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253223 + 6253224.

It is an arithmetic number, because the mean of its divisors is an integer number (6253224).

Almost surely, 2^12506447 is an apocalyptic number.

12506447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12506447 is an equidigital number, since it uses as much as digits as its factorization.

12506447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 12506447 is about 3536.4455318865. The cubic root of 12506447 is about 232.1193339208.

Adding to 12506447 its reverse (74460521), we get a palindrome (86966968).

The spelling of 12506447 in words is "twelve million, five hundred six thousand, four hundred forty-seven".