432243421 has 2 divisors, whose sum is σ = 432243422. Its totient is φ = 432243420.

The previous prime is 432243403. The next prime is 432243431. The reversal of 432243421 is 124342234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432224100 + 19321 = 20790^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 432243421 - 2¹⁹ = 431719133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432243401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216121710 + 216121711.

It is an arithmetic number, because the mean of its divisors is an integer number (216121711).

Almost surely, 2^432243421 is an apocalyptic number.

It is an amenable number.

432243421 is a deficient number, since it is larger than the sum of its proper divisors (1).

432243421 is an equidigital number, since it uses as much as digits as its factorization.

432243421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 25.

The square root of 432243421 is about 20790.4646653219. The cubic root of 432243421 is about 756.0945899627.

Adding to 432243421 its reverse (124342234), we get a palindrome (556585655).

The spelling of 432243421 in words is "four hundred thirty-two million, two hundred forty-three thousand, four hundred twenty-one".