1340426543 has 2 divisors, whose sum is σ = 1340426544. Its totient is φ = 1340426542.

The previous prime is 1340426513. The next prime is 1340426561. The reversal of 1340426543 is 3456240431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1340426543 - 2²² = 1336232239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340426513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670213271 + 670213272.

It is an arithmetic number, because the mean of its divisors is an integer number (670213272).

Almost surely, 2^1340426543 is an apocalyptic number.

1340426543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340426543 is an equidigital number, since it uses as much as digits as its factorization.

1340426543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 1340426543 is about 36611.8361052816. The cubic root of 1340426543 is about 1102.5907372663.

Adding to 1340426543 its reverse (3456240431), we get a palindrome (4796666974).

The spelling of 1340426543 in words is "one billion, three hundred forty million, four hundred twenty-six thousand, five hundred forty-three".