1125231136 has 48 divisors (see below), whose sum is σ = 2270733696. Its totient is φ = 548626176.

The previous prime is 1125231097. The next prime is 1125231143. The reversal of 1125231136 is 6311325211.

It is a happy number.

It is a super-2 number, since 2×1125231136² = 2532290218847700992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1125231136.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460510 + ... + 462946.

It is an arithmetic number, because the mean of its divisors is an integer number (47306952).

Almost surely, 2^1125231136 is an apocalyptic number.

1125231136 is a gapful number since it is divisible by the number (16) 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 1125231136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135366848).

1125231136 is an abundant number, since it is smaller than the sum of its proper divisors (1145502560).

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

1125231136 is a wasteful number, since it uses less digits than its factorization.

1125231136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801 (or 2793 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 1125231136 is about 33544.4650575918. The cubic root of 1125231136 is about 1040.1131336492.

Adding to 1125231136 its reverse (6311325211), we get a palindrome (7436556347).

The spelling of 1125231136 in words is "one billion, one hundred twenty-five million, two hundred thirty-one thousand, one hundred thirty-six".