1304400120509 has 2 divisors, whose sum is σ = 1304400120510. Its totient is φ = 1304400120508.

The previous prime is 1304400120421. The next prime is 1304400120523. The reversal of 1304400120509 is 9050210044031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1033469460409 + 270930660100 = 1016597^2 + 520510^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304400120509 - 2¹² = 1304400116413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304400120539) 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 as a sum of consecutive naturals, namely, 652200060254 + 652200060255.

It is an arithmetic number, because the mean of its divisors is an integer number (652200060255).

Almost surely, 2^{1304400120509} is an apocalyptic number.

It is an amenable number.

1304400120509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304400120509 is an equidigital number, since it uses as much as digits as its factorization.

1304400120509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 1304400120509 in words is "one trillion, three hundred four billion, four hundred million, one hundred twenty thousand, five hundred nine".