1343240005 has 4 divisors (see below), whose sum is σ = 1611888012. Its totient is φ = 1074592000.

The previous prime is 1343239987. The next prime is 1343240021. The reversal of 1343240005 is 5000423431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5000423431 = 43 ⋅116288917.

It can be written as a sum of positive squares in 2 ways, for example, as 1046263716 + 296976289 = 32346^2 + 17233^2 .

It is not a de Polignac number, because 1343240005 - 2¹⁵ = 1343207237 is a prime.

It is a super-2 number, since 2×1343240005² = 3608587422064800050, which contains 22 as substring.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134323996 + ... + 134324005.

It is an arithmetic number, because the mean of its divisors is an integer number (402972003).

Almost surely, 2^1343240005 is an apocalyptic number.

It is an amenable number.

1343240005 is a deficient number, since it is larger than the sum of its proper divisors (268648007).

1343240005 is an equidigital number, since it uses as much as digits as its factorization.

1343240005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268648006.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1343240005 is about 36650.2388123188. The cubic root of 1343240005 is about 1103.3616185757.

Adding to 1343240005 its reverse (5000423431), we get a palindrome (6343663436).

The spelling of 1343240005 in words is "one billion, three hundred forty-three million, two hundred forty thousand, five".