1304005 has 8 divisors (see below), whose sum is σ = 1603224. Its totient is φ = 1017600.

The previous prime is 1304003. The next prime is 1304029. The reversal of 1304005 is 5004031.

It can be written as a sum of positive squares in 4 ways, for example, as 11236 + 1292769 = 106^2 + 1137^2 .

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

It is not a de Polignac number, because 1304005 - 2¹ = 1304003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2976 + ... + 3385.

It is an arithmetic number, because the mean of its divisors is an integer number (200403).

2^1304005 is an apocalyptic number.

It is an amenable number.

1304005 is a deficient number, since it is larger than the sum of its proper divisors (299219).

1304005 is an equidigital number, since it uses as much as digits as its factorization.

1304005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6407.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 1304005 is about 1141.9303831670. The cubic root of 1304005 is about 109.2512510613.

Adding to 1304005 its reverse (5004031), we get a palindrome (6308036).

The spelling of 1304005 in words is "one million, three hundred four thousand, five".