240412321 has 2 divisors, whose sum is σ = 240412322. Its totient is φ = 240412320.

The previous prime is 240412313. The next prime is 240412327. The reversal of 240412321 is 123214042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226803600 + 13608721 = 15060^2 + 3689^2 .

It is a cyclic number.

It is not a de Polignac number, because 240412321 - 2³ = 240412313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240412327) 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 as a sum of consecutive naturals, namely, 120206160 + 120206161.

It is an arithmetic number, because the mean of its divisors is an integer number (120206161).

Almost surely, 2^240412321 is an apocalyptic number.

It is an amenable number.

240412321 is a deficient number, since it is larger than the sum of its proper divisors (1).

240412321 is an equidigital number, since it uses as much as digits as its factorization.

240412321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 240412321 is about 15505.2352771572. The cubic root of 240412321 is about 621.8021801420.

Adding to 240412321 its reverse (123214042), we get a palindrome (363626363).

It can be divided in two parts, 24041 and 2321, that added together give a palindrome (26362).

The spelling of 240412321 in words is "two hundred forty million, four hundred twelve thousand, three hundred twenty-one".