1304243121543 has 16 divisors (see below), whose sum is σ = 1743654076416. Its totient is φ = 867164111840.

The previous prime is 1304243121443. The next prime is 1304243121581. The reversal of 1304243121543 is 3451213424031.

It is a cyclic number.

It is not a de Polignac number, because 1304243121543 - 2¹⁰ = 1304243120519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304243121583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21180946 + ... + 21242432.

It is an arithmetic number, because the mean of its divisors is an integer number (108978379776).

Almost surely, 2^{1304243121543} is an apocalyptic number.

1304243121543 is a deficient number, since it is larger than the sum of its proper divisors (439410954873).

1304243121543 is a wasteful number, since it uses less digits than its factorization.

1304243121543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80334.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 1304243121543 its reverse (3451213424031), we get a palindrome (4755456545574).

The spelling of 1304243121543 in words is "one trillion, three hundred four billion, two hundred forty-three million, one hundred twenty-one thousand, five hundred forty-three".