1244321278247 has 2 divisors, whose sum is σ = 1244321278248. Its totient is φ = 1244321278246.

The previous prime is 1244321278241. The next prime is 1244321278261. The reversal of 1244321278247 is 7428721234421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1244321278247 - 2¹⁰ = 1244321277223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244321278241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622160639123 + 622160639124.

It is an arithmetic number, because the mean of its divisors is an integer number (622160639124).

Almost surely, 2^{1244321278247} is an apocalyptic number.

1244321278247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244321278247 is an equidigital number, since it uses as much as digits as its factorization.

1244321278247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1204224, while the sum is 47.

The spelling of 1244321278247 in words is "one trillion, two hundred forty-four billion, three hundred twenty-one million, two hundred seventy-eight thousand, two hundred forty-seven".