1224340225 has 12 divisors (see below), whose sum is σ = 1525894524. Its totient is φ = 974496320.

The previous prime is 1224340223. The next prime is 1224340231. The reversal of 1224340225 is 5220434221.

It can be written as a sum of positive squares in 6 ways, for example, as 45859984 + 1178480241 = 6772^2 + 34329^2 .

It is not a de Polignac number, because 1224340225 - 2¹ = 1224340223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1224340225.

It is not an unprimeable number, because it can be changed into a prime (1224340223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119374 + ... + 129223.

It is an arithmetic number, because the mean of its divisors is an integer number (127157877).

Almost surely, 2^1224340225 is an apocalyptic number.

It is an amenable number.

1224340225 is a deficient number, since it is larger than the sum of its proper divisors (301554299).

1224340225 is a wasteful number, since it uses less digits than its factorization.

1224340225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248804 (or 248799 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1224340225 is about 34990.5733734102. The cubic root of 1224340225 is about 1069.7953505603.

Adding to 1224340225 its reverse (5220434221), we get a palindrome (6444774446).

The spelling of 1224340225 in words is "one billion, two hundred twenty-four million, three hundred forty thousand, two hundred twenty-five".