11530143 has 12 divisors (see below), whose sum is σ = 17061408. Its totient is φ = 7499040.

The previous prime is 11530133. The next prime is 11530157. The reversal of 11530143 is 34103511.

It is not a de Polignac number, because 11530143 - 2⁹ = 11529631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11530133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15255 + ... + 15992.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^11530143 is an apocalyptic number.

11530143 is a deficient number, since it is larger than the sum of its proper divisors (5531265).

11530143 is a wasteful number, since it uses less digits than its factorization.

11530143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31294 (or 31291 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 11530143 is about 3395.6064259569. The cubic root of 11530143 is about 225.9149117125.

Adding to 11530143 its reverse (34103511), we get a palindrome (45633654).

The spelling of 11530143 in words is "eleven million, five hundred thirty thousand, one hundred forty-three".