1328565 has 16 divisors (see below), whose sum is σ = 2429568. Its totient is φ = 607296.

The previous prime is 1328563. The next prime is 1328573. The reversal of 1328565 is 5658231.

It is not a de Polignac number, because 1328565 - 2¹ = 1328563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6222 + ... + 6431.

It is an arithmetic number, because the mean of its divisors is an integer number (151848).

2^1328565 is an apocalyptic number.

1328565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328565 is a deficient number, since it is larger than the sum of its proper divisors (1101003).

1328565 is a wasteful number, since it uses less digits than its factorization.

1328565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12668.

The product of its digits is 7200, while the sum is 30.

The square root of 1328565 is about 1152.6339401562. The cubic root of 1328565 is about 109.9328791621.

The spelling of 1328565 in words is "one million, three hundred twenty-eight thousand, five hundred sixty-five".