140323421 has 4 divisors (see below), whose sum is σ = 160369632. Its totient is φ = 120277212.

The previous prime is 140323399. The next prime is 140323427. The reversal of 140323421 is 124323041.

140323421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124323041 = 4583 ⋅27127.

It is a cyclic number.

It is not a de Polignac number, because 140323421 - 2⁶ = 140323357 is a prime.

It is a super-3 number, since 3×140323421³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140323393 and 140323402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140323427) 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, 10023095 + ... + 10023108.

It is an arithmetic number, because the mean of its divisors is an integer number (40092408).

Almost surely, 2^140323421 is an apocalyptic number.

It is an amenable number.

140323421 is a deficient number, since it is larger than the sum of its proper divisors (20046211).

140323421 is an equidigital number, since it uses as much as digits as its factorization.

140323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20046210.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 140323421 is about 11845.8187137910. The cubic root of 140323421 is about 519.6489506850.

Adding to 140323421 its reverse (124323041), we get a palindrome (264646462).

The spelling of 140323421 in words is "one hundred forty million, three hundred twenty-three thousand, four hundred twenty-one".