240404321 has 4 divisors (see below), whose sum is σ = 253057200. Its totient is φ = 227751444.

The previous prime is 240404317. The next prime is 240404363. The reversal of 240404321 is 123404042.

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: 123404042 = 2 ⋅61702021.

It is a cyclic number.

It is not a de Polignac number, because 240404321 - 2² = 240404317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240404293 and 240404302.

It is not an unprimeable number, because it can be changed into a prime (240404221) 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 3 ways as a sum of consecutive naturals, for example, 6326411 + ... + 6326448.

It is an arithmetic number, because the mean of its divisors is an integer number (63264300).

Almost surely, 2^240404321 is an apocalyptic number.

It is an amenable number.

240404321 is a deficient number, since it is larger than the sum of its proper divisors (12652879).

240404321 is a wasteful number, since it uses less digits than its factorization.

240404321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12652878.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 240404321 is about 15504.9772976293. The cubic root of 240404321 is about 621.7952830015.

Adding to 240404321 its reverse (123404042), we get a palindrome (363808363).

The spelling of 240404321 in words is "two hundred forty million, four hundred four thousand, three hundred twenty-one".