1304503121345 has 16 divisors (see below), whose sum is σ = 1638785554560. Its totient is φ = 994976889984.

The previous prime is 1304503121321. The next prime is 1304503121401. The reversal of 1304503121345 is 5431213054031.

It is a cyclic number.

It is not a de Polignac number, because 1304503121345 - 2³⁰ = 1303429379521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18439460 + ... + 18510069.

It is an arithmetic number, because the mean of its divisors is an integer number (102424097160).

Almost surely, 2^{1304503121345} is an apocalyptic number.

It is an amenable number.

1304503121345 is a deficient number, since it is larger than the sum of its proper divisors (334282433215).

1304503121345 is a wasteful number, since it uses less digits than its factorization.

1304503121345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36949864.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 1304503121345 its reverse (5431213054031), we get a palindrome (6735716175376).

The spelling of 1304503121345 in words is "one trillion, three hundred four billion, five hundred three million, one hundred twenty-one thousand, three hundred forty-five".