1205344242005 has 4 divisors (see below), whose sum is σ = 1446413090412. Its totient is φ = 964275393600.

The previous prime is 1205344242001. The next prime is 1205344242061. The reversal of 1205344242005 is 5002424435021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220966745041 + 984377496964 = 470071^2 + 992158^2 .

It is not a de Polignac number, because 1205344242005 - 2² = 1205344242001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205344242001) 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 in 3 ways as a sum of consecutive naturals, for example, 120534424196 + ... + 120534424205.

It is an arithmetic number, because the mean of its divisors is an integer number (361603272603).

Almost surely, 2^{1205344242005} is an apocalyptic number.

It is an amenable number.

1205344242005 is a deficient number, since it is larger than the sum of its proper divisors (241068848407).

1205344242005 is an equidigital number, since it uses as much as digits as its factorization.

1205344242005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241068848406.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 1205344242005 its reverse (5002424435021), we get a palindrome (6207768677026).

The spelling of 1205344242005 in words is "one trillion, two hundred five billion, three hundred forty-four million, two hundred forty-two thousand, five".