432001321 has 2 divisors, whose sum is σ = 432001322. Its totient is φ = 432001320.

The previous prime is 432001303. The next prime is 432001333. The reversal of 432001321 is 123100234.

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., 377758096 + 54243225 = 19436^2 + 7365^2 .

It is a cyclic number.

It is not a de Polignac number, because 432001321 - 2⁵ = 432001289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 432001295 and 432001304.

It is not a weakly prime, because it can be changed into another prime (432001391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216000660 + 216000661.

It is an arithmetic number, because the mean of its divisors is an integer number (216000661).

Almost surely, 2^432001321 is an apocalyptic number.

It is an amenable number.

432001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

432001321 is an equidigital number, since it uses as much as digits as its factorization.

432001321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 432001321 is about 20784.6414691233. The cubic root of 432001321 is about 755.9534004712.

Adding to 432001321 its reverse (123100234), we get a palindrome (555101555).

It can be divided in two parts, 43200 and 1321, that added together give a square (44521 = 211²).

The spelling of 432001321 in words is "four hundred thirty-two million, one thousand, three hundred twenty-one".