11125209 has 8 divisors (see below), whose sum is σ = 14871520. Its totient is φ = 7397856.

The previous prime is 11125201. The next prime is 11125223. The reversal of 11125209 is 90252111.

11125209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11125209 - 2³ = 11125201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11125201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3307 + ... + 5760.

It is an arithmetic number, because the mean of its divisors is an integer number (1858940).

Almost surely, 2^11125209 is an apocalyptic number.

It is an amenable number.

11125209 is a deficient number, since it is larger than the sum of its proper divisors (3746311).

11125209 is an equidigital number, since it uses as much as digits as its factorization.

11125209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 11125209 is about 3335.4473463090. The cubic root of 11125209 is about 223.2386527206.

The spelling of 11125209 in words is "eleven million, one hundred twenty-five thousand, two hundred nine".