1304540645 has 8 divisors (see below), whose sum is σ = 1657534104. Its totient is φ = 982242304.

The previous prime is 1304540609. The next prime is 1304540651. The reversal of 1304540645 is 5460454031.

It can be written as a sum of positive squares in 4 ways, for example, as 448041889 + 856498756 = 21167^2 + 29266^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1304540645 - 2⁸ = 1304540389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 7673684 + ... + 7673853.

It is an arithmetic number, because the mean of its divisors is an integer number (207191763).

Almost surely, 2^1304540645 is an apocalyptic number.

It is an amenable number.

1304540645 is a deficient number, since it is larger than the sum of its proper divisors (352993459).

1304540645 is a wasteful number, since it uses less digits than its factorization.

1304540645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15347559.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1304540645 is about 36118.4252840569. The cubic root of 1304540645 is about 1092.6620802736.

Adding to 1304540645 its reverse (5460454031), we get a palindrome (6764994676).

The spelling of 1304540645 in words is "one billion, three hundred four million, five hundred forty thousand, six hundred forty-five".