1304865 has 24 divisors (see below), whose sum is σ = 2291328. Its totient is φ = 686880.

The previous prime is 1304857. The next prime is 1304867. The reversal of 1304865 is 5684031.

It is not a de Polignac number, because 1304865 - 2³ = 1304857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1304867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4680 + ... + 4950.

It is an arithmetic number, because the mean of its divisors is an integer number (95472).

2^1304865 is an apocalyptic number.

1304865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1304865 is a deficient number, since it is larger than the sum of its proper divisors (986463).

1304865 is a wasteful number, since it uses less digits than its factorization.

1304865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1304865 is about 1142.3068764566. The cubic root of 1304865 is about 109.2752630931.

Adding to 1304865 its reverse (5684031), we get a palindrome (6988896).

The spelling of 1304865 in words is "one million, three hundred four thousand, eight hundred sixty-five".