1340611305 has 16 divisors (see below), whose sum is σ = 2339976384. Its totient is φ = 649993280.

The previous prime is 1340611303. The next prime is 1340611339. The reversal of 1340611305 is 5031160431.

It is not a de Polignac number, because 1340611305 - 2¹ = 1340611303 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1340611303) 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 in 15 ways as a sum of consecutive naturals, for example, 4062294 + ... + 4062623.

It is an arithmetic number, because the mean of its divisors is an integer number (146248524).

Almost surely, 2^1340611305 is an apocalyptic number.

1340611305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340611305 is a deficient number, since it is larger than the sum of its proper divisors (999365079).

1340611305 is a wasteful number, since it uses less digits than its factorization.

1340611305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124936.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1340611305 is about 36614.3592733780. The cubic root of 1340611305 is about 1102.6413946513.

Adding to 1340611305 its reverse (5031160431), we get a palindrome (6371771736).

The spelling of 1340611305 in words is "one billion, three hundred forty million, six hundred eleven thousand, three hundred five".