1125111623 has 2 divisors, whose sum is σ = 1125111624. Its totient is φ = 1125111622.

The previous prime is 1125111583. The next prime is 1125111643. The reversal of 1125111623 is 3261115211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1125111623 - 2¹⁰ = 1125110599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125111643) 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, 562555811 + 562555812.

It is an arithmetic number, because the mean of its divisors is an integer number (562555812).

Almost surely, 2^1125111623 is an apocalyptic number.

1125111623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125111623 is an equidigital number, since it uses as much as digits as its factorization.

1125111623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

The square root of 1125111623 is about 33542.6835986628. The cubic root of 1125111623 is about 1040.0763081953.

Adding to 1125111623 its reverse (3261115211), we get a palindrome (4386226834).

The spelling of 1125111623 in words is "one billion, one hundred twenty-five million, one hundred eleven thousand, six hundred twenty-three".