1244647 has 2 divisors, whose sum is σ = 1244648. Its totient is φ = 1244646.

The previous prime is 1244629. The next prime is 1244687. The reversal of 1244647 is 7464421.

It is a weak prime.

It is an emirp because it is prime and its reverse (7464421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1244647 - 2¹⁹ = 720359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622323 + 622324.

It is an arithmetic number, because the mean of its divisors is an integer number (622324).

2^1244647 is an apocalyptic number.

1244647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244647 is an equidigital number, since it uses as much as digits as its factorization.

1244647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

The square root of 1244647 is about 1115.6374859245. The cubic root of 1244647 is about 107.5677452922.

It can be divided in two parts, 1244 and 647, that added together give a triangular number (1891 = T₆₁).

The spelling of 1244647 in words is "one million, two hundred forty-four thousand, six hundred forty-seven".