1244405225 has 72 divisors (see below), whose sum is σ = 1938893760. Its totient is φ = 787543680.

The previous prime is 1244405221. The next prime is 1244405249. The reversal of 1244405225 is 5225044421.

It is not a de Polignac number, because 1244405225 - 2² = 1244405221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (1244405221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 816314 + ... + 817836.

It is an arithmetic number, because the mean of its divisors is an integer number (26929080).

Almost surely, 2^1244405225 is an apocalyptic number.

It is an amenable number.

1244405225 is a deficient number, since it is larger than the sum of its proper divisors (694488535).

1244405225 is a wasteful number, since it uses less digits than its factorization.

1244405225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 1244405225 is about 35276.1282597736. The cubic root of 1244405225 is about 1075.6077976283.

Adding to 1244405225 its reverse (5225044421), we get a palindrome (6469449646).

The spelling of 1244405225 in words is "one billion, two hundred forty-four million, four hundred five thousand, two hundred twenty-five".