1345042505 has 4 divisors (see below), whose sum is σ = 1614051012. Its totient is φ = 1076034000.

The previous prime is 1345042483. The next prime is 1345042513. The reversal of 1345042505 is 5052405431.

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 181413961 + 1163628544 = 13469^2 + 34112^2 .

It is not a de Polignac number, because 1345042505 - 2⁸ = 1345042249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134504246 + ... + 134504255.

It is an arithmetic number, because the mean of its divisors is an integer number (403512753).

Almost surely, 2^1345042505 is an apocalyptic number.

It is an amenable number.

1345042505 is a deficient number, since it is larger than the sum of its proper divisors (269008507).

1345042505 is an equidigital number, since it uses as much as digits as its factorization.

1345042505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269008506.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1345042505 is about 36674.8211311248. The cubic root of 1345042505 is about 1103.8549333408.

Adding to 1345042505 its reverse (5052405431), we get a palindrome (6397447936).

It can be divided in two parts, 13450 and 42505, that added together give a palindrome (55955).

The spelling of 1345042505 in words is "one billion, three hundred forty-five million, forty-two thousand, five hundred five".