1125557099 has 2 divisors, whose sum is σ = 1125557100. Its totient is φ = 1125557098.

The previous prime is 1125557039. The next prime is 1125557119. The reversal of 1125557099 is 9907555211.

It is a strong prime.

It is an emirp because it is prime and its reverse (9907555211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125557099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125557009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562778549 + 562778550.

It is an arithmetic number, because the mean of its divisors is an integer number (562778550).

Almost surely, 2^1125557099 is an apocalyptic number.

1125557099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125557099 is an equidigital number, since it uses as much as digits as its factorization.

1125557099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141750, while the sum is 44.

The square root of 1125557099 is about 33549.3233761875. The cubic root of 1125557099 is about 1040.2135591392.

The spelling of 1125557099 in words is "one billion, one hundred twenty-five million, five hundred fifty-seven thousand, ninety-nine".