1304211421 has 4 divisors (see below), whose sum is σ = 1304387644. Its totient is φ = 1304035200.

The previous prime is 1304211401. The next prime is 1304211427. The reversal of 1304211421 is 1241124031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 489736900 + 814474521 = 22130^2 + 28539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304211421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304211427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76500 + ... + 91981.

It is an arithmetic number, because the mean of its divisors is an integer number (326096911).

Almost surely, 2^1304211421 is an apocalyptic number.

It is an amenable number.

1304211421 is a deficient number, since it is larger than the sum of its proper divisors (176223).

1304211421 is an equidigital number, since it uses as much as digits as its factorization.

1304211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176222.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1304211421 is about 36113.8674334389. The cubic root of 1304211421 is about 1092.5701549798.

Adding to 1304211421 its reverse (1241124031), we get a palindrome (2545335452).

The spelling of 1304211421 in words is "one billion, three hundred four million, two hundred eleven thousand, four hundred twenty-one".