1304430421 has 6 divisors (see below), whose sum is σ = 1517398710. Its totient is φ = 1118083176.

The previous prime is 1304430409. The next prime is 1304430467. The reversal of 1304430421 is 1240344031.

It can be written as a sum of positive squares in only one way, i.e., 920819025 + 383611396 = 30345^2 + 19586^2 .

It is not a de Polignac number, because 1304430421 - 2²¹ = 1302333269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304430392 and 1304430401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304431421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13310466 + ... + 13310563.

It is an arithmetic number, because the mean of its divisors is an integer number (252899785).

Almost surely, 2^1304430421 is an apocalyptic number.

It is an amenable number.

1304430421 is a deficient number, since it is larger than the sum of its proper divisors (212968289).

1304430421 is an equidigital number, since it uses as much as digits as its factorization.

1304430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26621043 (or 26621036 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1304430421 is about 36116.8993824221. The cubic root of 1304430421 is about 1092.6313054621.

Adding to 1304430421 its reverse (1240344031), we get a palindrome (2544774452).

The spelling of 1304430421 in words is "one billion, three hundred four million, four hundred thirty thousand, four hundred twenty-one".