1223544 has 32 divisors (see below), whose sum is σ = 3496320. Its totient is φ = 349536.

The previous prime is 1223533. The next prime is 1223549. The reversal of 1223544 is 4453221.

Added to its reverse (4453221) it gives a triangular number (5676765 = T₃₃₆₉).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1223544.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3474 + ... + 3809.

It is an arithmetic number, because the mean of its divisors is an integer number (109260).

2^1223544 is an apocalyptic number.

1223544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1223544 is an abundant number, since it is smaller than the sum of its proper divisors (2272776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223544 is a wasteful number, since it uses less digits than its factorization.

1223544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7299 (or 7295 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 1223544 is about 1106.1392317426. The cubic root of 1223544 is about 106.9563393652.

Adding to 1223544 its reverse (4453221), we get a palindrome (5676765).

The spelling of 1223544 in words is "one million, two hundred twenty-three thousand, five hundred forty-four".