1109140225 has 6 divisors (see below), whose sum is σ = 1375333910. Its totient is φ = 887312160.

The previous prime is 1109140213. The next prime is 1109140243. The reversal of 1109140225 is 5220419011.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 141681409 + 967458816 = 11903^2 + 31104^2 .

It is not a de Polignac number, because 1109140225 - 2²⁷ = 974922497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 44365609 = 1109140225 / (1 + 1 + 0 + 9 + 1 + 4 + 0 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1109140225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22182780 + ... + 22182829.

Almost surely, 2^1109140225 is an apocalyptic number.

It is an amenable number.

1109140225 is a deficient number, since it is larger than the sum of its proper divisors (266193685).

1109140225 is an equidigital number, since it uses as much as digits as its factorization.

1109140225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44365619 (or 44365614 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1109140225 is about 33303.7569202035. The cubic root of 1109140225 is about 1035.1314060638.

Adding to 1109140225 its reverse (5220419011), we get a palindrome (6329559236).

The spelling of 1109140225 in words is "one billion, one hundred nine million, one hundred forty thousand, two hundred twenty-five".