140434221 has 4 divisors (see below), whose sum is σ = 187245632. Its totient is φ = 93622812.

The previous prime is 140434213. The next prime is 140434223. The reversal of 140434221 is 122434041.

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.

It is not a de Polignac number, because 140434221 - 2³ = 140434213 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 (140434223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23405701 + ... + 23405706.

It is an arithmetic number, because the mean of its divisors is an integer number (46811408).

Almost surely, 2^140434221 is an apocalyptic number.

It is an amenable number.

140434221 is a deficient number, since it is larger than the sum of its proper divisors (46811411).

140434221 is an equidigital number, since it uses as much as digits as its factorization.

140434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46811410.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 140434221 is about 11850.4945466423. The cubic root of 140434221 is about 519.7856870796.

Adding to 140434221 its reverse (122434041), we get a palindrome (262868262).

The spelling of 140434221 in words is "one hundred forty million, four hundred thirty-four thousand, two hundred twenty-one".