1304405 has 8 divisors (see below), whose sum is σ = 1601952. Its totient is φ = 1019088.

The previous prime is 1304389. The next prime is 1304411. The reversal of 1304405 is 5044031.

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

It is a cyclic number.

It is not a de Polignac number, because 1304405 - 2⁴ = 1304389 is a prime.

It is a super-3 number, since 3×1304405³ = 6658227333516690375, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2819 + ... + 3248.

It is an arithmetic number, because the mean of its divisors is an integer number (200244).

2^1304405 is an apocalyptic number.

It is an amenable number.

1304405 is a deficient number, since it is larger than the sum of its proper divisors (297547).

1304405 is an equidigital number, since it uses as much as digits as its factorization.

1304405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1304405 is about 1142.1055117633. The cubic root of 1304405 is about 109.2624207610.

Adding to 1304405 its reverse (5044031), we get a palindrome (6348436).

The spelling of 1304405 in words is "one million, three hundred four thousand, four hundred five".