1328287 has 8 divisors (see below), whose sum is σ = 1387440. Its totient is φ = 1270080.

The previous prime is 1328279. The next prime is 1328297. The reversal of 1328287 is 7828231.

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

It is a cyclic number.

It is not a de Polignac number, because 1328287 - 2³ = 1328279 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁵ + 2² + 8³ + 2²⁰ + 8⁶ + 7⁵ .

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328207) 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, 4587 + ... + 4867.

It is an arithmetic number, because the mean of its divisors is an integer number (173430).

2^1328287 is an apocalyptic number.

1328287 is a deficient number, since it is larger than the sum of its proper divisors (59153).

1328287 is a wasteful number, since it uses less digits than its factorization.

1328287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its digits is 5376, while the sum is 31.

The square root of 1328287 is about 1152.5133404868. The cubic root of 1328287 is about 109.9252108703.

The spelling of 1328287 in words is "one million, three hundred twenty-eight thousand, two hundred eighty-seven".