1328765 has 16 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 987840.

The previous prime is 1328749. The next prime is 1328777. The reversal of 1328765 is 5678231.

It is a happy number.

It is not a de Polignac number, because 1328765 - 2⁴ = 1328749 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6647 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^1328765 is an apocalyptic number.

It is an amenable number.

1328765 is a deficient number, since it is larger than the sum of its proper divisors (381955).

1328765 is a wasteful number, since it uses less digits than its factorization.

1328765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292.

The product of its digits is 10080, while the sum is 32.

The square root of 1328765 is about 1152.7206947045. The cubic root of 1328765 is about 109.9383952572.

The spelling of 1328765 in words is "one million, three hundred twenty-eight thousand, seven hundred sixty-five".