1344430421 has 2 divisors, whose sum is σ = 1344430422. Its totient is φ = 1344430420.

The previous prime is 1344430411. The next prime is 1344430429. The reversal of 1344430421 is 1240344431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1158653521 + 185776900 = 34039^2 + 13630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344430421 - 2¹⁰ = 1344429397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344430429) 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, 672215210 + 672215211.

It is an arithmetic number, because the mean of its divisors is an integer number (672215211).

Almost surely, 2^1344430421 is an apocalyptic number.

It is an amenable number.

1344430421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344430421 is an equidigital number, since it uses as much as digits as its factorization.

1344430421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1344430421 is about 36666.4754373801. The cubic root of 1344430421 is about 1103.6874654094.

Adding to 1344430421 its reverse (1240344431), we get a palindrome (2584774852).

The spelling of 1344430421 in words is "one billion, three hundred forty-four million, four hundred thirty thousand, four hundred twenty-one".