1328685 has 16 divisors (see below), whose sum is σ = 2140224. Its totient is φ = 703872.

The previous prime is 1328683. The next prime is 1328699. The reversal of 1328685 is 5868231.

1328685 = 360² + 361² + ... + 369².

It is a happy number.

It is not a de Polignac number, because 1328685 - 2¹ = 1328683 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328683) 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, 4089 + ... + 4401.

It is an arithmetic number, because the mean of its divisors is an integer number (133764).

2^1328685 is an apocalyptic number.

1328685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328685 is a deficient number, since it is larger than the sum of its proper divisors (811539).

1328685 is a wasteful number, since it uses less digits than its factorization.

1328685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its digits is 11520, while the sum is 33.

The square root of 1328685 is about 1152.6859936687. The cubic root of 1328685 is about 109.9361888856.

The spelling of 1328685 in words is "one million, three hundred twenty-eight thousand, six hundred eighty-five".