1131204530 has 16 divisors (see below), whose sum is σ = 2042216280. Its totient is φ = 451137792.

The previous prime is 1131204527. The next prime is 1131204533. The reversal of 1131204530 is 354021311.

It is an interprime number because it is at equal distance from previous prime (1131204527) and next prime (1131204533).

It can be written as a sum of positive squares in 4 ways, for example, as 800946601 + 330257929 = 28301^2 + 18173^2 .

It is not an unprimeable number, because it can be changed into a prime (1131204533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164465 + ... + 171204.

Almost surely, 2^1131204530 is an apocalyptic number.

1131204530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131204530 is a deficient number, since it is larger than the sum of its proper divisors (911011750).

1131204530 is a wasteful number, since it uses less digits than its factorization.

1131204530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336013.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1131204530 is about 33633.3841591952. The cubic root of 1131204530 is about 1041.9503987697.

Adding to 1131204530 its reverse (354021311), we get a palindrome (1485225841).

The spelling of 1131204530 in words is "one billion, one hundred thirty-one million, two hundred four thousand, five hundred thirty".