1131243064 has 16 divisors (see below), whose sum is σ = 2424092400. Its totient is φ = 484818432.

The previous prime is 1131243037. The next prime is 1131243067. The reversal of 1131243064 is 4603421311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131243067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10100329 + ... + 10100440.

It is an arithmetic number, because the mean of its divisors is an integer number (151505775).

Almost surely, 2^1131243064 is an apocalyptic number.

1131243064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1131243064 is an abundant number, since it is smaller than the sum of its proper divisors (1292849336).

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

1131243064 is a wasteful number, since it uses less digits than its factorization.

1131243064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200782 (or 20200778 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1131243064 is about 33633.9570077623. The cubic root of 1131243064 is about 1041.9622298340.

Adding to 1131243064 its reverse (4603421311), we get a palindrome (5734664375).

The spelling of 1131243064 in words is "one billion, one hundred thirty-one million, two hundred forty-three thousand, sixty-four".