1224255 has 16 divisors (see below), whose sum is σ = 2074464. Its totient is φ = 614400.

The previous prime is 1224239. The next prime is 1224257. The reversal of 1224255 is 5524221.

It is a happy number.

It is not a de Polignac number, because 1224255 - 2⁴ = 1224239 is a prime.

It is a d-powerful number, because it can be written as 1 + 2³ + 2¹⁶ + 4⁷ + 2²⁰ + 5⁶ + 5⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224257) 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, 2146 + ... + 2655.

It is an arithmetic number, because the mean of its divisors is an integer number (129654).

2^1224255 is an apocalyptic number.

1224255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1224255 is a deficient number, since it is larger than the sum of its proper divisors (850209).

1224255 is a wasteful number, since it uses less digits than its factorization.

1224255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826.

The product of its digits is 800, while the sum is 21.

The square root of 1224255 is about 1106.4605731792. The cubic root of 1224255 is about 106.9770527552.

Adding to 1224255 its reverse (5524221), we get a palindrome (6748476).

The spelling of 1224255 in words is "one million, two hundred twenty-four thousand, two hundred fifty-five".