1205344241513 has 4 divisors (see below), whose sum is σ = 1205346519120. Its totient is φ = 1205341963908.

The previous prime is 1205344241503. The next prime is 1205344241527. The reversal of 1205344241513 is 3151424435021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205344241513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205344241503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115598 + ... + 1556936.

It is an arithmetic number, because the mean of its divisors is an integer number (301336629780).

Almost surely, 2^{1205344241513} is an apocalyptic number.

It is an amenable number.

1205344241513 is a deficient number, since it is larger than the sum of its proper divisors (2277607).

1205344241513 is an equidigital number, since it uses as much as digits as its factorization.

1205344241513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277606.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 1205344241513 its reverse (3151424435021), we get a palindrome (4356768676534).

The spelling of 1205344241513 in words is "one trillion, two hundred five billion, three hundred forty-four million, two hundred forty-one thousand, five hundred thirteen".