1125516389 has 2 divisors, whose sum is σ = 1125516390. Its totient is φ = 1125516388.

The previous prime is 1125516377. The next prime is 1125516421. The reversal of 1125516389 is 9836155211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1000456900 + 125059489 = 31630^2 + 11183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125516389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125516089) 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 as a sum of consecutive naturals, namely, 562758194 + 562758195.

It is an arithmetic number, because the mean of its divisors is an integer number (562758195).

Almost surely, 2^1125516389 is an apocalyptic number.

It is an amenable number.

1125516389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125516389 is an equidigital number, since it uses as much as digits as its factorization.

1125516389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 41.

The square root of 1125516389 is about 33548.7166520569. The cubic root of 1125516389 is about 1040.2010179112.

The spelling of 1125516389 in words is "one billion, one hundred twenty-five million, five hundred sixteen thousand, three hundred eighty-nine".