1320447 has 8 divisors (see below), whose sum is σ = 1782144. Its totient is φ = 869528.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320447 is 7440231.

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 1320447 - 2⁸ = 1320191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2403 + ... + 2900.

It is an arithmetic number, because the mean of its divisors is an integer number (222768).

2^1320447 is an apocalyptic number.

1320447 is a deficient number, since it is larger than the sum of its proper divisors (461697).

1320447 is an equidigital number, since it uses as much as digits as its factorization.

1320447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 1320447 is about 1149.1070446220. The cubic root of 1320447 is about 109.7085120175.

Adding to 1320447 its reverse (7440231), we get a palindrome (8760678).

The spelling of 1320447 in words is "one million, three hundred twenty thousand, four hundred forty-seven".