1320543 has 40 divisors (see below), whose sum is σ = 2404512. Its totient is φ = 705024.

The previous prime is 1320541. The next prime is 1320607. The reversal of 1320543 is 3450231.

It is not a de Polignac number, because 1320543 - 2¹ = 1320541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320541) 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 in 39 ways as a sum of consecutive naturals, for example, 9571 + ... + 9707.

2^1320543 is an apocalyptic number.

1320543 is a deficient number, since it is larger than the sum of its proper divisors (1083969).

1320543 is a wasteful number, since it uses less digits than its factorization.

1320543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1320543 is about 1149.1488154282. The cubic root of 1320543 is about 109.7111706530.

Adding to 1320543 its reverse (3450231), we get a palindrome (4770774).

The spelling of 1320543 in words is "one million, three hundred twenty thousand, five hundred forty-three".