1340341345 has 12 divisors (see below), whose sum is σ = 1871007444. Its totient is φ = 919091040.

The previous prime is 1340341333. The next prime is 1340341357. The reversal of 1340341345 is 5431430431.

It is an interprime number because it is at equal distance from previous prime (1340341333) and next prime (1340341357).

It can be written as a sum of positive squares in 2 ways, for example, as 904325184 + 436016161 = 30072^2 + 20881^2 .

It is not a de Polignac number, because 1340341345 - 2⁵ = 1340341313 is a prime.

It is a super-4 number, since 4×1340341345⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 2735146 + ... + 2735635.

It is an arithmetic number, because the mean of its divisors is an integer number (155917287).

Almost surely, 2^1340341345 is an apocalyptic number.

It is an amenable number.

1340341345 is a deficient number, since it is larger than the sum of its proper divisors (530666099).

1340341345 is an equidigital number, since it uses as much as digits as its factorization.

1340341345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470800 (or 5470793 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 1340341345 is about 36610.6725559638. The cubic root of 1340341345 is about 1102.5673764148.

Adding to 1340341345 its reverse (5431430431), we get a palindrome (6771771776).

The spelling of 1340341345 in words is "one billion, three hundred forty million, three hundred forty-one thousand, three hundred forty-five".