1244113225 has 24 divisors (see below), whose sum is σ = 1587585888. Its totient is φ = 966556800.

The previous prime is 1244113223. The next prime is 1244113243. The reversal of 1244113225 is 5223114421.

It is not a de Polignac number, because 1244113225 - 2¹ = 1244113223 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 1244113225.

It is not an unprimeable number, because it can be changed into a prime (1244113223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230002 + ... + 235348.

It is an arithmetic number, because the mean of its divisors is an integer number (66149412).

Almost surely, 2^1244113225 is an apocalyptic number.

It is an amenable number.

1244113225 is a deficient number, since it is larger than the sum of its proper divisors (343472663).

1244113225 is a wasteful number, since it uses less digits than its factorization.

1244113225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5625 (or 5620 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 1244113225 is about 35271.9892407559. The cubic root of 1244113225 is about 1075.5236605000.

Adding to 1244113225 its reverse (5223114421), we get a palindrome (6467227646).

The spelling of 1244113225 in words is "one billion, two hundred forty-four million, one hundred thirteen thousand, two hundred twenty-five".