1125441689 has 2 divisors, whose sum is σ = 1125441690. Its totient is φ = 1125441688.

The previous prime is 1125441673. The next prime is 1125441703. The reversal of 1125441689 is 9861445211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 724040464 + 401401225 = 26908^2 + 20035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125441689 - 2⁴ = 1125441673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1125441389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562720844 + 562720845.

It is an arithmetic number, because the mean of its divisors is an integer number (562720845).

Almost surely, 2^1125441689 is an apocalyptic number.

It is an amenable number.

1125441689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125441689 is an equidigital number, since it uses as much as digits as its factorization.

1125441689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 1125441689 is about 33547.6033272125. The cubic root of 1125441689 is about 1040.1780048493.

The spelling of 1125441689 in words is "one billion, one hundred twenty-five million, four hundred forty-one thousand, six hundred eighty-nine".