1125124555 has 4 divisors (see below), whose sum is σ = 1350149472. Its totient is φ = 900099640.

The previous prime is 1125124523. The next prime is 1125124621. The reversal of 1125124555 is 5554215211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5554215211 = 113 ⋅49152347.

It is not a de Polignac number, because 1125124555 - 2⁵ = 1125124523 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 112512451 + ... + 112512460.

It is an arithmetic number, because the mean of its divisors is an integer number (337537368).

Almost surely, 2^1125124555 is an apocalyptic number.

1125124555 is a deficient number, since it is larger than the sum of its proper divisors (225024917).

1125124555 is an equidigital number, since it uses as much as digits as its factorization.

1125124555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225024916.

The product of its digits is 10000, while the sum is 31.

The square root of 1125124555 is about 33542.8763674197. The cubic root of 1125124555 is about 1040.0802930489.

Adding to 1125124555 its reverse (5554215211), we get a palindrome (6679339766).

The spelling of 1125124555 in words is "one billion, one hundred twenty-five million, one hundred twenty-four thousand, five hundred fifty-five".