430921 has 2 divisors, whose sum is σ = 430922. Its totient is φ = 430920.

The previous prime is 430909. The next prime is 430949. The reversal of 430921 is 129034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 57600 = 611^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 430921 - 2¹¹ = 428873 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (430981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215460 + 215461.

It is an arithmetic number, because the mean of its divisors is an integer number (215461).

2⁴³⁰⁹²¹ is an apocalyptic number.

It is an amenable number.

430921 is a deficient number, since it is larger than the sum of its proper divisors (1).

430921 is an equidigital number, since it uses as much as digits as its factorization.

430921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 430921 is about 656.4457327152. The cubic root of 430921 is about 75.5322727985.

Adding to 430921 its reverse (129034), we get a palindrome (559955).

The spelling of 430921 in words is "four hundred thirty thousand, nine hundred twenty-one".