1131240512 has 56 divisors (see below), whose sum is σ = 2338852320. Its totient is φ = 542397440.

The previous prime is 1131240511. The next prime is 1131240521. The reversal of 1131240512 is 2150421311.

It is not an unprimeable number, because it can be changed into a prime (1131240511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151163 + ... + 158469.

It is an arithmetic number, because the mean of its divisors is an integer number (41765220).

Almost surely, 2^1131240512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131240512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169426160).

1131240512 is an abundant number, since it is smaller than the sum of its proper divisors (1207611808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131240512 is an equidigital number, since it uses as much as digits as its factorization.

1131240512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7419 (or 7409 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1131240512 is about 33633.9190698913. The cubic root of 1131240512 is about 1041.9614463037.

Adding to 1131240512 its reverse (2150421311), we get a palindrome (3281661823).

The spelling of 1131240512 in words is "one billion, one hundred thirty-one million, two hundred forty thousand, five hundred twelve".