1205434220489 has 2 divisors, whose sum is σ = 1205434220490. Its totient is φ = 1205434220488.

The previous prime is 1205434220467. The next prime is 1205434220503. The reversal of 1205434220489 is 9840224345021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 910077840400 + 295356380089 = 953980^2 + 543467^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205434220489 - 2²⁰ = 1205433171913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205434220189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602717110244 + 602717110245.

It is an arithmetic number, because the mean of its divisors is an integer number (602717110245).

Almost surely, 2^{1205434220489} is an apocalyptic number.

It is an amenable number.

1205434220489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205434220489 is an equidigital number, since it uses as much as digits as its factorization.

1205434220489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 1205434220489 in words is "one trillion, two hundred five billion, four hundred thirty-four million, two hundred twenty thousand, four hundred eighty-nine".