1340305345 has 8 divisors (see below), whose sum is σ = 1642587264. Its totient is φ = 1049430384.

The previous prime is 1340305339. The next prime is 1340305349. The reversal of 1340305345 is 5435030431.

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 1340305345 - 2¹⁷ = 1340174273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340305349) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2851479 + ... + 2851948.

It is an arithmetic number, because the mean of its divisors is an integer number (205323408).

Almost surely, 2^1340305345 is an apocalyptic number.

It is an amenable number.

1340305345 is a deficient number, since it is larger than the sum of its proper divisors (302281919).

1340305345 is an equidigital number, since it uses as much as digits as its factorization.

1340305345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5703479.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 1340305345 is about 36610.1808927517. The cubic root of 1340305345 is about 1102.5575051033.

Adding to 1340305345 its reverse (5435030431), we get a palindrome (6775335776).

The spelling of 1340305345 in words is "one billion, three hundred forty million, three hundred five thousand, three hundred forty-five".