424928321 has 2 divisors, whose sum is σ = 424928322. Its totient is φ = 424928320.

The previous prime is 424928299. The next prime is 424928323. The reversal of 424928321 is 123829424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423330625 + 1597696 = 20575^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 424928321 - 2¹⁰ = 424927297 is a prime.

Together with 424928323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (424928323) 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, 212464160 + 212464161.

It is an arithmetic number, because the mean of its divisors is an integer number (212464161).

Almost surely, 2^424928321 is an apocalyptic number.

It is an amenable number.

424928321 is a deficient number, since it is larger than the sum of its proper divisors (1).

424928321 is an equidigital number, since it uses as much as digits as its factorization.

424928321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 35.

The square root of 424928321 is about 20613.7895836743. The cubic root of 424928321 is about 751.8050277554.

The spelling of 424928321 in words is "four hundred twenty-four million, nine hundred twenty-eight thousand, three hundred twenty-one".