1125811578 has 16 divisors (see below), whose sum is σ = 2254273056. Its totient is φ = 374828880.

The previous prime is 1125811573. The next prime is 1125811601. The reversal of 1125811578 is 8751185211.

It is not an unprimeable number, because it can be changed into a prime (1125811573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104868 + ... + 115103.

It is an arithmetic number, because the mean of its divisors is an integer number (140892066).

Almost surely, 2^1125811578 is an apocalyptic number.

1125811578 is an abundant number, since it is smaller than the sum of its proper divisors (1128461478).

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

1125811578 is a wasteful number, since it uses less digits than its factorization.

1125811578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220829.

The product of its digits is 22400, while the sum is 39.

The square root of 1125811578 is about 33553.1157718624. The cubic root of 1125811578 is about 1040.2919477461.

Adding to 1125811578 its reverse (8751185211), we get a palindrome (9876996789).

The spelling of 1125811578 in words is "one billion, one hundred twenty-five million, eight hundred eleven thousand, five hundred seventy-eight".