1340351345 has 4 divisors (see below), whose sum is σ = 1608421620. Its totient is φ = 1072281072.

The previous prime is 1340351297. The next prime is 1340351351. The reversal of 1340351345 is 5431530431.

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 879003904 + 461347441 = 29648^2 + 21479^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340351345 - 2¹⁰ = 1340350321 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134035130 + ... + 134035139.

It is an arithmetic number, because the mean of its divisors is an integer number (402105405).

Almost surely, 2^1340351345 is an apocalyptic number.

It is an amenable number.

1340351345 is a deficient number, since it is larger than the sum of its proper divisors (268070275).

1340351345 is an equidigital number, since it uses as much as digits as its factorization.

1340351345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268070274.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 1340351345 is about 36610.8091279065. The cubic root of 1340351345 is about 1102.5701184145.

Adding to 1340351345 its reverse (5431530431), we get a palindrome (6771881776).

The spelling of 1340351345 in words is "one billion, three hundred forty million, three hundred fifty-one thousand, three hundred forty-five".