1304621 has 4 divisors (see below), whose sum is σ = 1316700. Its totient is φ = 1292544.

The previous prime is 1304609. The next prime is 1304627. The reversal of 1304621 is 1264031.

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 469225 + 835396 = 685^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304621 - 2¹⁰ = 1303597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1304621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304627) 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 in 3 ways as a sum of consecutive naturals, for example, 5876 + ... + 6093.

It is an arithmetic number, because the mean of its divisors is an integer number (329175).

2^1304621 is an apocalyptic number.

It is an amenable number.

1304621 is a deficient number, since it is larger than the sum of its proper divisors (12079).

1304621 is a wasteful number, since it uses less digits than its factorization.

1304621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12078.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1304621 is about 1142.2000700403. The cubic root of 1304621 is about 109.2684514494.

Adding to 1304621 its reverse (1264031), we get a palindrome (2568652).

The spelling of 1304621 in words is "one million, three hundred four thousand, six hundred twenty-one".