1430321 has 2 divisors, whose sum is σ = 1430322. Its totient is φ = 1430320.

The previous prime is 1430293. The next prime is 1430357. The reversal of 1430321 is 1230341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 640000 = 889^2 + 800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1430321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1430296 and 1430305.

It is not a weakly prime, because it can be changed into another prime (1430381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715160 + 715161.

It is an arithmetic number, because the mean of its divisors is an integer number (715161).

2^1430321 is an apocalyptic number.

It is an amenable number.

1430321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1430321 is an equidigital number, since it uses as much as digits as its factorization.

1430321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1430321 is about 1195.9602836215. The cubic root of 1430321 is about 112.6707464803.

Adding to 1430321 its reverse (1230341), we get a palindrome (2660662).

The spelling of 1430321 in words is "one million, four hundred thirty thousand, three hundred twenty-one".