140423321 has 4 divisors (see below), whose sum is σ = 140447952. Its totient is φ = 140398692.

The previous prime is 140423317. The next prime is 140423329. The reversal of 140423321 is 123324041.

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: 123324041 = 19 ⋅6490739.

It is a cyclic number.

It is not a de Polignac number, because 140423321 - 2² = 140423317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140423293 and 140423302.

It is not an unprimeable number, because it can be changed into a prime (140423329) 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, 1130 + ... + 16796.

It is an arithmetic number, because the mean of its divisors is an integer number (35111988).

Almost surely, 2^140423321 is an apocalyptic number.

It is an amenable number.

140423321 is a deficient number, since it is larger than the sum of its proper divisors (24631).

140423321 is an equidigital number, since it uses as much as digits as its factorization.

140423321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24630.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 140423321 is about 11850.0346412996. The cubic root of 140423321 is about 519.7722387655.

Adding to 140423321 its reverse (123324041), we get a palindrome (263747362).

The spelling of 140423321 in words is "one hundred forty million, four hundred twenty-three thousand, three hundred twenty-one".