1125568889 has 4 divisors (see below), whose sum is σ = 1144020900. Its totient is φ = 1107116880.

The previous prime is 1125568883. The next prime is 1125568919. The reversal of 1125568889 is 9888655211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 488763664 + 636805225 = 22108^2 + 25235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125568889 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1125568889.

It is not an unprimeable number, because it can be changed into a prime (1125568883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9225914 + ... + 9226035.

It is an arithmetic number, because the mean of its divisors is an integer number (286005225).

Almost surely, 2^1125568889 is an apocalyptic number.

It is an amenable number.

1125568889 is a deficient number, since it is larger than the sum of its proper divisors (18452011).

1125568889 is an equidigital number, since it uses as much as digits as its factorization.

1125568889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18452010.

The product of its digits is 1382400, while the sum is 53.

The square root of 1125568889 is about 33549.4990871697. The cubic root of 1125568889 is about 1040.2171911406.

The spelling of 1125568889 in words is "one billion, one hundred twenty-five million, five hundred sixty-eight thousand, eight hundred eighty-nine".