140021543 has 2 divisors, whose sum is σ = 140021544. Its totient is φ = 140021542.

The previous prime is 140021501. The next prime is 140021551. The reversal of 140021543 is 345120041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140021543 - 2¹⁶ = 139956007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140021593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010771 + 70010772.

It is an arithmetic number, because the mean of its divisors is an integer number (70010772).

Almost surely, 2^140021543 is an apocalyptic number.

140021543 is a deficient number, since it is larger than the sum of its proper divisors (1).

140021543 is an equidigital number, since it uses as much as digits as its factorization.

140021543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 140021543 is about 11833.0698890863. The cubic root of 140021543 is about 519.2760426049.

Adding to 140021543 its reverse (345120041), we get a palindrome (485141584).

The spelling of 140021543 in words is "one hundred forty million, twenty-one thousand, five hundred forty-three".