140424221 has 8 divisors (see below), whose sum is σ = 164399424. Its totient is φ = 117427680.

The previous prime is 140424191. The next prime is 140424241. The reversal of 140424221 is 122424041.

140424221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140424221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140424193 and 140424202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140424241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244355 + ... + 244928.

It is an arithmetic number, because the mean of its divisors is an integer number (20549928).

Almost surely, 2^140424221 is an apocalyptic number.

It is an amenable number.

140424221 is a deficient number, since it is larger than the sum of its proper divisors (23975203).

140424221 is an equidigital number, since it uses as much as digits as its factorization.

140424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489331.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 140424221 is about 11850.0726158113. The cubic root of 140424221 is about 519.7733492031.

Adding to 140424221 its reverse (122424041), we get a palindrome (262848262).

The spelling of 140424221 in words is "one hundred forty million, four hundred twenty-four thousand, two hundred twenty-one".