1205280009841 has 2 divisors, whose sum is σ = 1205280009842. Its totient is φ = 1205280009840.

The previous prime is 1205280009793. The next prime is 1205280009881. The reversal of 1205280009841 is 1489000825021.

It is an a-pointer prime, because the next prime (1205280009881) can be obtained adding 1205280009841 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1086889651600 + 118390358241 = 1042540^2 + 344079^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205280009841 - 2²¹ = 1205277912689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1205280009794 and 1205280009803.

It is not a weakly prime, because it can be changed into another prime (1205280009881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602640004920 + 602640004921.

It is an arithmetic number, because the mean of its divisors is an integer number (602640004921).

Almost surely, 2^{1205280009841} is an apocalyptic number.

It is an amenable number.

1205280009841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205280009841 is an equidigital number, since it uses as much as digits as its factorization.

1205280009841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 40.

The spelling of 1205280009841 in words is "one trillion, two hundred five billion, two hundred eighty million, nine thousand, eight hundred forty-one".