1224225 has 18 divisors (see below), whose sum is σ = 2193126. Its totient is φ = 652800.

The previous prime is 1224217. The next prime is 1224229. The reversal of 1224225 is 5224221.

It can be written as a sum of positive squares in 3 ways, for example, as 159201 + 1065024 = 399^2 + 1032^2 .

It is not a de Polignac number, because 1224225 - 2³ = 1224217 is a prime.

It is a Curzon number.

1224225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1224198 and 1224207.

It is not an unprimeable number, because it can be changed into a prime (1224229) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2496 + ... + 2945.

2^1224225 is an apocalyptic number.

1224225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224225 is a deficient number, since it is larger than the sum of its proper divisors (968901).

1224225 is a wasteful number, since it uses less digits than its factorization.

1224225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457 (or 5449 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 1224225 is about 1106.4470163546. The cubic root of 1224225 is about 106.9761789345.

Adding to 1224225 its reverse (5224221), we get a palindrome (6448446).

The spelling of 1224225 in words is "one million, two hundred twenty-four thousand, two hundred twenty-five".