1125300020 has 54 divisors (see below), whose sum is σ = 2563334802. Its totient is φ = 414775296.

The previous prime is 1125299999. The next prime is 1125300101. The reversal of 1125300020 is 200035211.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 25847056 + 1099452964 = 5084^2 + 33158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1125299968 and 1125300004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1949972 + ... + 1950548.

It is an arithmetic number, because the mean of its divisors is an integer number (47469163).

Almost surely, 2^1125300020 is an apocalyptic number.

1125300020 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 1125300020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281667401).

1125300020 is an abundant number, since it is smaller than the sum of its proper divisors (1438034782).

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

1125300020 is an equidigital number, since it uses as much as digits as its factorization.

1125300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1125300020 is about 33545.4917984518. The cubic root of 1125300020 is about 1040.1343576416.

Adding to 1125300020 its reverse (200035211), we get a palindrome (1325335231).

The spelling of 1125300020 in words is "one billion, one hundred twenty-five million, three hundred thousand, twenty".