1224636 has 48 divisors (see below), whose sum is σ = 3333120. Its totient is φ = 342720.

The previous prime is 1224599. The next prime is 1224637. The reversal of 1224636 is 6364221.

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 1 + 2¹⁷ + 2¹⁹ + 4⁸ + 6⁶ + 3¹¹ + 6⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224637) 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 15 ways as a sum of consecutive naturals, for example, 5005 + ... + 5243.

It is an arithmetic number, because the mean of its divisors is an integer number (69440).

2^1224636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666560).

1224636 is an abundant number, since it is smaller than the sum of its proper divisors (2108484).

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

1224636 is a wasteful number, since it uses less digits than its factorization.

1224636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 312 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 1224636 is about 1106.6327304034. The cubic root of 1224636 is about 106.9881490354.

Adding to 1224636 its reverse (6364221), we get a palindrome (7588857).

The spelling of 1224636 in words is "one million, two hundred twenty-four thousand, six hundred thirty-six".