1100138125 has 10 divisors (see below), whose sum is σ = 1374733382. Its totient is φ = 880110000.

The previous prime is 1100138087. The next prime is 1100138129. The reversal of 1100138125 is 5218310011.

It can be written as a sum of positive squares in 5 ways, for example, as 718990596 + 381147529 = 26814^2 + 19523^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1100138125 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100138096 and 1100138105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100138129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 879486 + ... + 880735.

Almost surely, 2^1100138125 is an apocalyptic number.

It is an amenable number.

1100138125 is a deficient number, since it is larger than the sum of its proper divisors (274595257).

1100138125 is an frugal number, since it uses more digits than its factorization.

1100138125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760241 (or 1760226 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1100138125 is about 33168.3301509135. The cubic root of 1100138125 is about 1032.3233208271.

Adding to 1100138125 its reverse (5218310011), we get a palindrome (6318448136).

The spelling of 1100138125 in words is "one billion, one hundred million, one hundred thirty-eight thousand, one hundred twenty-five".