12247681 has 2 divisors, whose sum is σ = 12247682. Its totient is φ = 12247680.

The previous prime is 12247679. The next prime is 12247709. The reversal of 12247681 is 18674221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 3837681 = 2900^2 + 1959^2 .

It is a cyclic number.

It is not a de Polignac number, because 12247681 - 2¹ = 12247679 is a prime.

It is a super-2 number, since 2×12247681² = 300011379755522, which contains 22 as substring.

Together with 12247679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12247181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6123840 + 6123841.

It is an arithmetic number, because the mean of its divisors is an integer number (6123841).

Almost surely, 2^12247681 is an apocalyptic number.

It is an amenable number.

12247681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12247681 is an equidigital number, since it uses as much as digits as its factorization.

12247681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 31.

The square root of 12247681 is about 3499.6686986056. The cubic root of 12247681 is about 230.5072672880.

The spelling of 12247681 in words is "twelve million, two hundred forty-seven thousand, six hundred eighty-one".