1131242125 has 16 divisors (see below), whose sum is σ = 1520391600. Its totient is φ = 835377600.

The previous prime is 1131242113. The next prime is 1131242129. The reversal of 1131242125 is 5212421311.

It can be written as a sum of positive squares in 8 ways, for example, as 740547369 + 390694756 = 27213^2 + 19766^2 .

It is not a de Polignac number, because 1131242125 - 2¹³ = 1131233933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131242096 and 1131242105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131242129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346450 + ... + 349699.

It is an arithmetic number, because the mean of its divisors is an integer number (95024475).

Almost surely, 2^1131242125 is an apocalyptic number.

It is an amenable number.

1131242125 is a deficient number, since it is larger than the sum of its proper divisors (389149475).

1131242125 is an equidigital number, since it uses as much as digits as its factorization.

1131242125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696177 (or 696167 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1131242125 is about 33633.9430486525. The cubic root of 1131242125 is about 1041.9619415368.

Adding to 1131242125 its reverse (5212421311), we get a palindrome (6343663436).

The spelling of 1131242125 in words is "one billion, one hundred thirty-one million, two hundred forty-two thousand, one hundred twenty-five".