1447428787171 has 2 divisors, whose sum is σ = 1447428787172. Its totient is φ = 1447428787170.

The previous prime is 1447428787151. The next prime is 1447428787219. The reversal of 1447428787171 is 1717878247441.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1447428787171 - 2¹⁵ = 1447428754403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1447428787121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 723714393585 + 723714393586.

It is an arithmetic number, because the mean of its divisors is an integer number (723714393586).

Almost surely, 2^{1447428787171} is an apocalyptic number.

1447428787171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1447428787171 is an equidigital number, since it uses as much as digits as its factorization.

1447428787171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19668992, while the sum is 61.

The spelling of 1447428787171 in words is "one trillion, four hundred forty-seven billion, four hundred twenty-eight million, seven hundred eighty-seven thousand, one hundred seventy-one".