1109165125 has 8 divisors (see below), whose sum is σ = 1384238232. Its totient is φ = 887332000.

The previous prime is 1109165111. The next prime is 1109165129. The reversal of 1109165125 is 5215619011.

It can be written as a sum of positive squares in 4 ways, for example, as 408321 + 1108756804 = 639^2 + 33298^2 .

It is not a de Polignac number, because 1109165125 - 2⁵ = 1109165093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109165129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4436536 + ... + 4436785.

It is an arithmetic number, because the mean of its divisors is an integer number (173029779).

Almost surely, 2^1109165125 is an apocalyptic number.

It is an amenable number.

1109165125 is a deficient number, since it is larger than the sum of its proper divisors (275073107).

1109165125 is an frugal number, since it uses more digits than its factorization.

1109165125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8873336 (or 8873326 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 31.

The square root of 1109165125 is about 33304.1307498034. The cubic root of 1109165125 is about 1035.1391521775.

The spelling of 1109165125 in words is "one billion, one hundred nine million, one hundred sixty-five thousand, one hundred twenty-five".