1304385 has 8 divisors (see below), whose sum is σ = 2087040. Its totient is φ = 695664.

The previous prime is 1304371. The next prime is 1304389. The reversal of 1304385 is 5834031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1304385 - 2⁶ = 1304321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1304389) 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 7 ways as a sum of consecutive naturals, for example, 43465 + ... + 43494.

It is an arithmetic number, because the mean of its divisors is an integer number (260880).

2^1304385 is an apocalyptic number.

1304385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1304385 is a deficient number, since it is larger than the sum of its proper divisors (782655).

1304385 is an equidigital number, since it uses as much as digits as its factorization.

1304385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86967.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1304385 is about 1142.0967559712. The cubic root of 1304385 is about 109.2618623303.

The spelling of 1304385 in words is "one million, three hundred four thousand, three hundred eighty-five".