1304440243123 has 4 divisors (see below), whose sum is σ = 1309049572888. Its totient is φ = 1299830913360.

The previous prime is 1304440243111. The next prime is 1304440243147. The reversal of 1304440243123 is 3213420444031.

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

It is a cyclic number.

It is not a de Polignac number, because 1304440243123 - 2⁵ = 1304440243091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304440243423) 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 in 3 ways as a sum of consecutive naturals, for example, 2304664458 + ... + 2304665023.

It is an arithmetic number, because the mean of its divisors is an integer number (327262393222).

Almost surely, 2^{1304440243123} is an apocalyptic number.

1304440243123 is a deficient number, since it is larger than the sum of its proper divisors (4609329765).

1304440243123 is an equidigital number, since it uses as much as digits as its factorization.

1304440243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609329764.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 1304440243123 its reverse (3213420444031), we get a palindrome (4517860687154).

The spelling of 1304440243123 in words is "one trillion, three hundred four billion, four hundred forty million, two hundred forty-three thousand, one hundred twenty-three".