1125423656 has 64 divisors (see below), whose sum is σ = 2576601600. Its totient is φ = 450090432.

The previous prime is 1125423653. The next prime is 1125423661. The reversal of 1125423656 is 6563245211.

It is not an unprimeable number, because it can be changed into a prime (1125423653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63395 + ... + 79181.

It is an arithmetic number, because the mean of its divisors is an integer number (40259400).

Almost surely, 2^1125423656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125423656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288300800).

1125423656 is an abundant number, since it is smaller than the sum of its proper divisors (1451177944).

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

1125423656 is a wasteful number, since it uses less digits than its factorization.

1125423656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15886 (or 15882 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1125423656 is about 33547.3345587992. The cubic root of 1125423656 is about 1040.1724492141.

Adding to 1125423656 its reverse (6563245211), we get a palindrome (7688668867).

The spelling of 1125423656 in words is "one billion, one hundred twenty-five million, four hundred twenty-three thousand, six hundred fifty-six".