1328489 has 4 divisors (see below), whose sum is σ = 1338324. Its totient is φ = 1318656.

The previous prime is 1328479. The next prime is 1328491. The reversal of 1328489 is 9848231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9848231 = 1627 ⋅6053.

It can be written as a sum of positive squares in 2 ways, for example, as 444889 + 883600 = 667^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328489 - 2⁴ = 1328473 is a prime.

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 (1328449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4712 + ... + 4985.

It is an arithmetic number, because the mean of its divisors is an integer number (334581).

2^1328489 is an apocalyptic number.

It is an amenable number.

1328489 is a deficient number, since it is larger than the sum of its proper divisors (9835).

1328489 is an equidigital number, since it uses as much as digits as its factorization.

1328489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9834.

The product of its digits is 13824, while the sum is 35.

The square root of 1328489 is about 1152.6009717157. The cubic root of 1328489 is about 109.9307829008.

The spelling of 1328489 in words is "one million, three hundred twenty-eight thousand, four hundred eighty-nine".