1340304023243 has 4 divisors (see below), whose sum is σ = 1383539636928. Its totient is φ = 1297068409560.

The previous prime is 1340304023221. The next prime is 1340304023249. The reversal of 1340304023243 is 3423204030431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340304023243 - 2³⁰ = 1339230281419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340304023249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21617806796 + ... + 21617806857.

It is an arithmetic number, because the mean of its divisors is an integer number (345884909232).

Almost surely, 2^{1340304023243} is an apocalyptic number.

1340304023243 is a deficient number, since it is larger than the sum of its proper divisors (43235613685).

1340304023243 is an equidigital number, since it uses as much as digits as its factorization.

1340304023243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43235613684.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 1340304023243 its reverse (3423204030431), we get a palindrome (4763508053674).

The spelling of 1340304023243 in words is "one trillion, three hundred forty billion, three hundred four million, twenty-three thousand, two hundred forty-three".