140543321 has 4 divisors (see below), whose sum is σ = 140610000. Its totient is φ = 140476644.

The previous prime is 140543311. The next prime is 140543341. The reversal of 140543321 is 123345041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123345041 = 3121 ⋅39521.

It is a cyclic number.

It is not a de Polignac number, because 140543321 - 2⁶ = 140543257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140543311) 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, 30071 + ... + 34428.

It is an arithmetic number, because the mean of its divisors is an integer number (35152500).

Almost surely, 2^140543321 is an apocalyptic number.

It is an amenable number.

140543321 is a deficient number, since it is larger than the sum of its proper divisors (66679).

140543321 is an equidigital number, since it uses as much as digits as its factorization.

140543321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66678.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 140543321 is about 11855.0968363822. The cubic root of 140543321 is about 519.9202552763.

Adding to 140543321 its reverse (123345041), we get a palindrome (263888362).

The spelling of 140543321 in words is "one hundred forty million, five hundred forty-three thousand, three hundred twenty-one".