1121224 has 16 divisors (see below), whose sum is σ = 2264220. Its totient is φ = 517440.

The previous prime is 1121221. The next prime is 1121231. The reversal of 1121224 is 4221211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1020100 + 101124 = 1010^2 + 318^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

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

It is not an unprimeable number, because it can be changed into a prime (1121221) 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, 5287 + ... + 5494.

2^1121224 is an apocalyptic number.

It is an amenable number.

1121224 is an abundant number, since it is smaller than the sum of its proper divisors (1142996).

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

1121224 is a wasteful number, since it uses less digits than its factorization.

1121224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10800 (or 10796 counting only the distinct ones).

The product of its digits is 32, while the sum is 13.

The square root of 1121224 is about 1058.8786521599. The cubic root of 1121224 is about 103.8876992925.

Subtracting from 1121224 its sum of digits (13), we obtain a palindrome (1121211).

Adding to 1121224 its reverse (4221211), we get a palindrome (5342435).

It can be divided in two parts, 11212 and 24, that added together give a square (11236 = 106²).

The spelling of 1121224 in words is "one million, one hundred twenty-one thousand, two hundred twenty-four".