1125320775 has 24 divisors (see below), whose sum is σ = 1910819664. Its totient is φ = 583948800.

The previous prime is 1125320773. The next prime is 1125320813. The reversal of 1125320775 is 5770235211.

It is a happy number.

It is not a de Polignac number, because 1125320775 - 2¹ = 1125320773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125320773) 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 in 23 ways as a sum of consecutive naturals, for example, 199986 + ... + 205535.

It is an arithmetic number, because the mean of its divisors is an integer number (79617486).

Almost surely, 2^1125320775 is an apocalyptic number.

1125320775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1125320775 is a deficient number, since it is larger than the sum of its proper divisors (785498889).

1125320775 is a wasteful number, since it uses less digits than its factorization.

1125320775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405571 (or 405566 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 1125320775 is about 33545.8011530504. The cubic root of 1125320775 is about 1040.1407523380.

Adding to 1125320775 its reverse (5770235211), we get a palindrome (6895555986).

The spelling of 1125320775 in words is "one billion, one hundred twenty-five million, three hundred twenty thousand, seven hundred seventy-five".