1284515055209 has 2 divisors, whose sum is σ = 1284515055210. Its totient is φ = 1284515055208.

The previous prime is 1284515055169. The next prime is 1284515055287. The reversal of 1284515055209 is 9025505154821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1131942789184 + 152572266025 = 1063928^2 + 390605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284515055209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1284515555209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642257527604 + 642257527605.

It is an arithmetic number, because the mean of its divisors is an integer number (642257527605).

Almost surely, 2^{1284515055209} is an apocalyptic number.

It is an amenable number.

1284515055209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284515055209 is an equidigital number, since it uses as much as digits as its factorization.

1284515055209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720000, while the sum is 47.

The spelling of 1284515055209 in words is "one trillion, two hundred eighty-four billion, five hundred fifteen million, fifty-five thousand, two hundred nine".