1128916125 has 48 divisors (see below), whose sum is σ = 2039624496. Its totient is φ = 600739200.

The previous prime is 1128916123. The next prime is 1128916163. The reversal of 1128916125 is 5216198211.

1128916125 is a `hidden beast` number, since 11 + 28 + 9 + 1 + 612 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1032915321 + 96000804 = 32139^2 + 9798^2 .

It is not a de Polignac number, because 1128916125 - 2¹ = 1128916123 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128916125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128916123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 688807 + ... + 690443.

It is an arithmetic number, because the mean of its divisors is an integer number (42492177).

Almost surely, 2^1128916125 is an apocalyptic number.

1128916125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128916125 is a deficient number, since it is larger than the sum of its proper divisors (910708371).

1128916125 is a wasteful number, since it uses less digits than its factorization.

1128916125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271 (or 2258 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 1128916125 is about 33599.3470918707. The cubic root of 1128916125 is about 1041.2473092409.

The spelling of 1128916125 in words is "one billion, one hundred twenty-eight million, nine hundred sixteen thousand, one hundred twenty-five".