1304689 has 4 divisors (see below), whose sum is σ = 1307124. Its totient is φ = 1302256.

The previous prime is 1304687. The next prime is 1304707. The reversal of 1304689 is 9864031.

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 270400 + 1034289 = 520^2 + 1017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304689 - 2¹ = 1304687 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 1304689.

It is not an unprimeable number, because it can be changed into a prime (1304687) 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, 22 + ... + 1615.

It is an arithmetic number, because the mean of its divisors is an integer number (326781).

2^1304689 is an apocalyptic number.

It is an amenable number.

1304689 is a deficient number, since it is larger than the sum of its proper divisors (2435).

1304689 is an equidigital number, since it uses as much as digits as its factorization.

1304689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1304689 is about 1142.2298367667. The cubic root of 1304689 is about 109.2703498617.

The spelling of 1304689 in words is "one million, three hundred four thousand, six hundred eighty-nine".