1125451940 has 48 divisors (see below), whose sum is σ = 2435068272. Its totient is φ = 436617216.

The previous prime is 1125451913. The next prime is 1125451949. The reversal of 1125451940 is 491545211.

It can be written as a sum of positive squares in 8 ways, for example, as 128913316 + 996538624 = 11354^2 + 31568^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1125451897 and 1125451906.

It is not an unprimeable number, because it can be changed into a prime (1125451949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247124 + ... + 251636.

It is an arithmetic number, because the mean of its divisors is an integer number (50730589).

Almost surely, 2^1125451940 is an apocalyptic number.

1125451940 is a gapful number since it is divisible by the number (10) 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 1125451940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217534136).

1125451940 is an abundant number, since it is smaller than the sum of its proper divisors (1309616332).

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

1125451940 is a wasteful number, since it uses less digits than its factorization.

1125451940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896 (or 4894 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1125451940 is about 33547.7561097609. The cubic root of 1125451940 is about 1040.1811629671.

The spelling of 1125451940 in words is "one billion, one hundred twenty-five million, four hundred fifty-one thousand, nine hundred forty".