11209143 has 8 divisors (see below), whose sum is σ = 16304256. Its totient is φ = 6793400.

The previous prime is 11209139. The next prime is 11209157. The reversal of 11209143 is 34190211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11209143 - 2² = 11209139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11209123) 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, 169803 + ... + 169868.

It is an arithmetic number, because the mean of its divisors is an integer number (2038032).

Almost surely, 2^11209143 is an apocalyptic number.

11209143 is a deficient number, since it is larger than the sum of its proper divisors (5095113).

11209143 is a wasteful number, since it uses less digits than its factorization.

11209143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339685.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 11209143 is about 3348.0058243677. The cubic root of 11209143 is about 223.7986538391.

Adding to 11209143 its reverse (34190211), we get a palindrome (45399354).

The spelling of 11209143 in words is "eleven million, two hundred nine thousand, one hundred forty-three".