1125870912 has 84 divisors (see below), whose sum is σ = 3241342260. Its totient is φ = 373635072.

The previous prime is 1125870901. The next prime is 1125870913. The reversal of 1125870912 is 2190785211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 615833856 + 510037056 = 24816^2 + 22584^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125870913) 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 11 ways as a sum of consecutive naturals, for example, 130014 + ... + 138402.

Almost surely, 2^1125870912 is an apocalyptic number.

1125870912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125870912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620671130).

1125870912 is an abundant number, since it is smaller than the sum of its proper divisors (2115471348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1125870912 is a wasteful number, since it uses less digits than its factorization.

1125870912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8640 (or 8627 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 1125870912 is about 33553.9999403946. Note that the first 4 decimals coincide. The cubic root of 1125870912 is about 1040.3102230358.

The spelling of 1125870912 in words is "one billion, one hundred twenty-five million, eight hundred seventy thousand, nine hundred twelve".