12722447 has 2 divisors, whose sum is σ = 12722448. Its totient is φ = 12722446.

The previous prime is 12722417. The next prime is 12722459. The reversal of 12722447 is 74422721.

It is a strong prime.

It is an emirp because it is prime and its reverse (74422721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12722447 - 2¹² = 12718351 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 (12722417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6361223 + 6361224.

It is an arithmetic number, because the mean of its divisors is an integer number (6361224).

Almost surely, 2^12722447 is an apocalyptic number.

12722447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12722447 is an equidigital number, since it uses as much as digits as its factorization.

12722447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 29.

The square root of 12722447 is about 3566.8539358936. The cubic root of 12722447 is about 233.4480318176.

The spelling of 12722447 in words is "twelve million, seven hundred twenty-two thousand, four hundred forty-seven".