1011125800 has 24 divisors (see below), whose sum is σ = 2350867950. Its totient is φ = 404450240.

The previous prime is 1011125783. The next prime is 1011125809. The reversal of 1011125800 is 85211101.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 933791364 + 77334436 = 30558^2 + 8794^2 .

It is not an unprimeable number, because it can be changed into a prime (1011125809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2527615 + ... + 2528014.

Almost surely, 2^1011125800 is an apocalyptic number.

1011125800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011125800 is an abundant number, since it is smaller than the sum of its proper divisors (1339742150).

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

1011125800 is a wasteful number, since it uses less digits than its factorization.

1011125800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055645 (or 5055636 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 1011125800 is about 31798.2043518184. The cubic root of 1011125800 is about 1003.6949306723.

Adding to 1011125800 its reverse (85211101), we get a palindrome (1096336901).

The spelling of 1011125800 in words is "one billion, eleven million, one hundred twenty-five thousand, eight hundred".