1345105120273 has 2 divisors, whose sum is σ = 1345105120274. Its totient is φ = 1345105120272.

The previous prime is 1345105120147. The next prime is 1345105120283. The reversal of 1345105120273 is 3720215015431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734162789889 + 610942330384 = 856833^2 + 781628^2 .

It is an emirp because it is prime and its reverse (3720215015431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1345105120273 - 2²⁹ = 1344568249361 is a prime.

It is a super-3 number, since 3×1345105120273³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1345105120283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672552560136 + 672552560137.

It is an arithmetic number, because the mean of its divisors is an integer number (672552560137).

Almost surely, 2^{1345105120273} is an apocalyptic number.

It is an amenable number.

1345105120273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345105120273 is an equidigital number, since it uses as much as digits as its factorization.

1345105120273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 1345105120273 in words is "one trillion, three hundred forty-five billion, one hundred five million, one hundred twenty thousand, two hundred seventy-three".