140543281 has 4 divisors (see below), whose sum is σ = 140761152. Its totient is φ = 140325412.

The previous prime is 140543257. The next prime is 140543303. The reversal of 140543281 is 182345041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140543281 - 2¹³ = 140535089 is a prime.

It is a super-2 number, since 2×140543281² = 39504827668489922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140543681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107965 + ... + 109258.

It is an arithmetic number, because the mean of its divisors is an integer number (35190288).

Almost surely, 2^140543281 is an apocalyptic number.

It is an amenable number.

140543281 is a deficient number, since it is larger than the sum of its proper divisors (217871).

140543281 is an equidigital number, since it uses as much as digits as its factorization.

140543281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217870.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 140543281 is about 11855.0951493440. The cubic root of 140543281 is about 519.9202059515.

The spelling of 140543281 in words is "one hundred forty million, five hundred forty-three thousand, two hundred eighty-one".