1345710385321 has 2 divisors, whose sum is σ = 1345710385322. Its totient is φ = 1345710385320.

The previous prime is 1345710385307. The next prime is 1345710385403. The reversal of 1345710385321 is 1235830175431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1339771525225 + 5938860096 = 1157485^2 + 77064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345710385321 - 2¹⁹ = 1345709861033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1345710380321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672855192660 + 672855192661.

It is an arithmetic number, because the mean of its divisors is an integer number (672855192661).

Almost surely, 2^{1345710385321} is an apocalyptic number.

It is an amenable number.

1345710385321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345710385321 is an equidigital number, since it uses as much as digits as its factorization.

1345710385321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 1345710385321 in words is "one trillion, three hundred forty-five billion, seven hundred ten million, three hundred eighty-five thousand, three hundred twenty-one".