1345044445 has 4 divisors (see below), whose sum is σ = 1614053340. Its totient is φ = 1076035552.

The previous prime is 1345044419. The next prime is 1345044499. The reversal of 1345044445 is 5444405431.

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 394062201 + 950982244 = 19851^2 + 30838^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345044445 - 2¹⁷ = 1344913373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1345044445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134504440 + ... + 134504449.

It is an arithmetic number, because the mean of its divisors is an integer number (403513335).

Almost surely, 2^1345044445 is an apocalyptic number.

It is an amenable number.

1345044445 is a deficient number, since it is larger than the sum of its proper divisors (269008895).

1345044445 is an equidigital number, since it uses as much as digits as its factorization.

1345044445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269008894.

The product of its (nonzero) digits is 76800, while the sum is 34.

The square root of 1345044445 is about 36674.8475797787. The cubic root of 1345044445 is about 1103.8554640496.

Adding to 1345044445 its reverse (5444405431), we get a palindrome (6789449876).

The spelling of 1345044445 in words is "one billion, three hundred forty-five million, forty-four thousand, four hundred forty-five".