140440321 has 16 divisors (see below), whose sum is σ = 164406400. Its totient is φ = 119916720.

The previous prime is 140440297. The next prime is 140440331. The reversal of 140440321 is 123044041.

It is not a de Polignac number, because 140440321 - 2²³ = 132051713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140440331) 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 15 ways as a sum of consecutive naturals, for example, 112915 + ... + 114151.

It is an arithmetic number, because the mean of its divisors is an integer number (10275400).

Almost surely, 2^140440321 is an apocalyptic number.

It is an amenable number.

140440321 is a deficient number, since it is larger than the sum of its proper divisors (23966079).

140440321 is an equidigital number, since it uses as much as digits as its factorization.

140440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1575 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140440321 is about 11850.7519170726. The cubic root of 140440321 is about 519.7932128967.

Adding to 140440321 its reverse (123044041), we get a palindrome (263484362).

The spelling of 140440321 in words is "one hundred forty million, four hundred forty thousand, three hundred twenty-one".