1223543 has 8 divisors (see below), whose sum is σ = 1307520. Its totient is φ = 1141560.

The previous prime is 1223533. The next prime is 1223549. The reversal of 1223543 is 3453221.

It is a happy number.

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 1223543 - 2⁴ = 1223527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223549) 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, 896 + ... + 1802.

It is an arithmetic number, because the mean of its divisors is an integer number (163440).

2^1223543 is an apocalyptic number.

1223543 is a deficient number, since it is larger than the sum of its proper divisors (83977).

1223543 is an equidigital number, since it uses as much as digits as its factorization.

1223543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997.

The product of its digits is 720, while the sum is 20.

The square root of 1223543 is about 1106.1387797198. The cubic root of 1223543 is about 106.9563102268.

Adding to 1223543 its reverse (3453221), we get a palindrome (4676764).

The spelling of 1223543 in words is "one million, two hundred twenty-three thousand, five hundred forty-three".