140561543 has 4 divisors (see below), whose sum is σ = 140613600. Its totient is φ = 140509488.

The previous prime is 140561503. The next prime is 140561549. The reversal of 140561543 is 345165041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345165041 = 13 ⋅26551157.

It is a cyclic number.

It is not a de Polignac number, because 140561543 - 2¹⁸ = 140299399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140561549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21743 + ... + 27456.

It is an arithmetic number, because the mean of its divisors is an integer number (35153400).

Almost surely, 2^140561543 is an apocalyptic number.

140561543 is a deficient number, since it is larger than the sum of its proper divisors (52057).

140561543 is an equidigital number, since it uses as much as digits as its factorization.

140561543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52056.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 140561543 is about 11855.8653416779. The cubic root of 140561543 is about 519.9427242142.

The spelling of 140561543 in words is "one hundred forty million, five hundred sixty-one thousand, five hundred forty-three".