1304212421 has 4 divisors (see below), whose sum is σ = 1372855200. Its totient is φ = 1235569644.

The previous prime is 1304212411. The next prime is 1304212423. The reversal of 1304212421 is 1242124031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1304212421 - 2¹⁰ = 1304211397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304212393 and 1304212402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304212423) 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, 34321361 + ... + 34321398.

It is an arithmetic number, because the mean of its divisors is an integer number (343213800).

Almost surely, 2^1304212421 is an apocalyptic number.

It is an amenable number.

1304212421 is a deficient number, since it is larger than the sum of its proper divisors (68642779).

1304212421 is an equidigital number, since it uses as much as digits as its factorization.

1304212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68642778.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1304212421 is about 36113.8812785333. The cubic root of 1304212421 is about 1092.5704342213.

Adding to 1304212421 its reverse (1242124031), we get a palindrome (2546336452).

The spelling of 1304212421 in words is "one billion, three hundred four million, two hundred twelve thousand, four hundred twenty-one".