1125563889 has 4 divisors (see below), whose sum is σ = 1500751856. Its totient is φ = 750375924.

The previous prime is 1125563869. The next prime is 1125563893. The reversal of 1125563889 is 9883655211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1125563889 - 2⁸ = 1125563633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125563839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187593979 + ... + 187593984.

It is an arithmetic number, because the mean of its divisors is an integer number (375187964).

Almost surely, 2^1125563889 is an apocalyptic number.

It is an amenable number.

1125563889 is a deficient number, since it is larger than the sum of its proper divisors (375187967).

1125563889 is an equidigital number, since it uses as much as digits as its factorization.

1125563889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375187966.

The product of its digits is 518400, while the sum is 48.

The square root of 1125563889 is about 33549.4245703261. The cubic root of 1125563889 is about 1040.2156508547.

The spelling of 1125563889 in words is "one billion, one hundred twenty-five million, five hundred sixty-three thousand, eight hundred eighty-nine".