140423221 has 8 divisors (see below), whose sum is σ = 143035200. Its totient is φ = 137834400.

The previous prime is 140423207. The next prime is 140423317. The reversal of 140423221 is 122324041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140423221 - 2⁵ = 140423189 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 (140423021) 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 7 ways as a sum of consecutive naturals, for example, 6696 + ... + 18046.

It is an arithmetic number, because the mean of its divisors is an integer number (17879400).

Almost surely, 2^140423221 is an apocalyptic number.

It is an amenable number.

140423221 is a deficient number, since it is larger than the sum of its proper divisors (2611979).

140423221 is a wasteful number, since it uses less digits than its factorization.

140423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11579.

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

The square root of 140423221 is about 11850.0304219019. The cubic root of 140423221 is about 519.7721153832.

Adding to 140423221 its reverse (122324041), we get a palindrome (262747262).

The spelling of 140423221 in words is "one hundred forty million, four hundred twenty-three thousand, two hundred twenty-one".