140442421 has 8 divisors (see below), whose sum is σ = 163534464. Its totient is φ = 118107600.

The previous prime is 140442413. The next prime is 140442443. The reversal of 140442421 is 124244041.

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 140442421 - 2³ = 140442413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140442392 and 140442401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140442451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188905 + ... + 189646.

It is an arithmetic number, because the mean of its divisors is an integer number (20441808).

Almost surely, 2^140442421 is an apocalyptic number.

It is an amenable number.

140442421 is a deficient number, since it is larger than the sum of its proper divisors (23092043).

140442421 is an equidigital number, since it uses as much as digits as its factorization.

140442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378611.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 140442421 is about 11850.8405187143. The cubic root of 140442421 is about 519.7958037014.

Adding to 140442421 its reverse (124244041), we get a palindrome (264686462).

The spelling of 140442421 in words is "one hundred forty million, four hundred forty-two thousand, four hundred twenty-one".