1223443 has 4 divisors (see below), whose sum is σ = 1317568. Its totient is φ = 1129320.

The previous prime is 1223437. The next prime is 1223447. The reversal of 1223443 is 3443221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223443 - 2⁹ = 1222931 is a prime.

It is a Duffinian number.

1223443 is a lucky number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1223443.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223447) 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, 47043 + ... + 47068.

It is an arithmetic number, because the mean of its divisors is an integer number (329392).

2^1223443 is an apocalyptic number.

1223443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1223443 is a deficient number, since it is larger than the sum of its proper divisors (94125).

1223443 is an equidigital number, since it uses as much as digits as its factorization.

1223443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94124.

The product of its digits is 576, while the sum is 19.

The square root of 1223443 is about 1106.0935765115. The cubic root of 1223443 is about 106.9533963059.

Adding to 1223443 its reverse (3443221), we get a palindrome (4666664).

The spelling of 1223443 in words is "one million, two hundred twenty-three thousand, four hundred forty-three".