1304421 has 4 divisors (see below), whose sum is σ = 1739232. Its totient is φ = 869612.

The previous prime is 1304419. The next prime is 1304477. The reversal of 1304421 is 1244031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1244031 = 3 ⋅414677.

It is a cyclic number.

It is not a de Polignac number, because 1304421 - 2¹ = 1304419 is a prime.

It is a D-number.

1304421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1304421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304411) 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 3 ways as a sum of consecutive naturals, for example, 217401 + ... + 217406.

It is an arithmetic number, because the mean of its divisors is an integer number (434808).

2^1304421 is an apocalyptic number.

It is an amenable number.

1304421 is a deficient number, since it is larger than the sum of its proper divisors (434811).

1304421 is an equidigital number, since it uses as much as digits as its factorization.

1304421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434810.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1304421 is about 1142.1125163485. The cubic root of 1304421 is about 109.2628675015.

Adding to 1304421 its reverse (1244031), we get a palindrome (2548452).

The spelling of 1304421 in words is "one million, three hundred four thousand, four hundred twenty-one".