1125575161 has 2 divisors, whose sum is σ = 1125575162. Its totient is φ = 1125575160.

The previous prime is 1125575159. The next prime is 1125575177. The reversal of 1125575161 is 1615755211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1045293561 + 80281600 = 32331^2 + 8960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125575161 - 2¹ = 1125575159 is a prime.

Together with 1125575159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1125576161) 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 as a sum of consecutive naturals, namely, 562787580 + 562787581.

It is an arithmetic number, because the mean of its divisors is an integer number (562787581).

Almost surely, 2^1125575161 is an apocalyptic number.

It is an amenable number.

1125575161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125575161 is an equidigital number, since it uses as much as digits as its factorization.

1125575161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 34.

The square root of 1125575161 is about 33549.5925608643. The cubic root of 1125575161 is about 1040.2191232688.

The spelling of 1125575161 in words is "one billion, one hundred twenty-five million, five hundred seventy-five thousand, one hundred sixty-one".