140002543 has 4 divisors (see below), whose sum is σ = 141287080. Its totient is φ = 138718008.

The previous prime is 140002501. The next prime is 140002571. The reversal of 140002543 is 345200041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345200041 = 10223 ⋅33767.

It is a cyclic number.

It is not a de Polignac number, because 140002543 - 2¹⁷ = 139871471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140002543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140002843) 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 in 3 ways as a sum of consecutive naturals, for example, 642105 + ... + 642322.

It is an arithmetic number, because the mean of its divisors is an integer number (35321770).

Almost surely, 2^140002543 is an apocalyptic number.

140002543 is a deficient number, since it is larger than the sum of its proper divisors (1284537).

140002543 is a wasteful number, since it uses less digits than its factorization.

140002543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284536.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 140002543 is about 11832.2670270747. The cubic root of 140002543 is about 519.2525540976.

Adding to 140002543 its reverse (345200041), we get a palindrome (485202584).

The spelling of 140002543 in words is "one hundred forty million, two thousand, five hundred forty-three".