1345220234305 has 4 divisors (see below), whose sum is σ = 1614264281172. Its totient is φ = 1076176187440.

The previous prime is 1345220234291. The next prime is 1345220234333. The reversal of 1345220234305 is 5034320225431.

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

It can be written as a sum of positive squares in 2 ways, for example, as 520943271696 + 824276962609 = 721764^2 + 907897^2 .

It is not a de Polignac number, because 1345220234305 - 2⁹ = 1345220233793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134522023426 + ... + 134522023435.

It is an arithmetic number, because the mean of its divisors is an integer number (403566070293).

Almost surely, 2^{1345220234305} is an apocalyptic number.

It is an amenable number.

1345220234305 is a deficient number, since it is larger than the sum of its proper divisors (269044046867).

1345220234305 is an equidigital number, since it uses as much as digits as its factorization.

1345220234305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269044046866.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 1345220234305 its reverse (5034320225431), we get a palindrome (6379540459736).

The spelling of 1345220234305 in words is "one trillion, three hundred forty-five billion, two hundred twenty million, two hundred thirty-four thousand, three hundred five".