140405543 has 2 divisors, whose sum is σ = 140405544. Its totient is φ = 140405542.

The previous prime is 140405537. The next prime is 140405557. The reversal of 140405543 is 345504041.

It is a weak prime.

It is an emirp because it is prime and its reverse (345504041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140405543 - 2⁴ = 140405527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140405513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70202771 + 70202772.

It is an arithmetic number, because the mean of its divisors is an integer number (70202772).

Almost surely, 2^140405543 is an apocalyptic number.

140405543 is a deficient number, since it is larger than the sum of its proper divisors (1).

140405543 is an equidigital number, since it uses as much as digits as its factorization.

140405543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 140405543 is about 11849.2844931667. The cubic root of 140405543 is about 519.7503029484.

Adding to 140405543 its reverse (345504041), we get a palindrome (485909584).

The spelling of 140405543 in words is "one hundred forty million, four hundred five thousand, five hundred forty-three".