1328447 has 2 divisors, whose sum is σ = 1328448. Its totient is φ = 1328446.

The previous prime is 1328417. The next prime is 1328449. The reversal of 1328447 is 7448231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328447 is a prime.

Together with 1328449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328449) by changing a digit.

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 as a sum of consecutive naturals, namely, 664223 + 664224.

It is an arithmetic number, because the mean of its divisors is an integer number (664224).

2^1328447 is an apocalyptic number.

1328447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328447 is an equidigital number, since it uses as much as digits as its factorization.

1328447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 1328447 is about 1152.5827519098. The cubic root of 1328447 is about 109.9296244063.

It can be divided in two parts, 13284 and 47, that added together give a palindrome (13331).

The spelling of 1328447 in words is "one million, three hundred twenty-eight thousand, four hundred forty-seven".