11725209 has 8 divisors (see below), whose sum is σ = 17370720. Its totient is φ = 7816788.

The previous prime is 11725183. The next prime is 11725213. The reversal of 11725209 is 90252711.

It is not a de Polignac number, because 11725209 - 2⁵ = 11725177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 434267 = 11725209 / (1 + 1 + 7 + 2 + 5 + 2 + 0 + 9).

It is not an unprimeable number, because it can be changed into a prime (11725289) 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, 217107 + ... + 217160.

It is an arithmetic number, because the mean of its divisors is an integer number (2171340).

Almost surely, 2^11725209 is an apocalyptic number.

It is an amenable number.

11725209 is a deficient number, since it is larger than the sum of its proper divisors (5645511).

11725209 is an equidigital number, since it uses as much as digits as its factorization.

11725209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434276 (or 434270 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 11725209 is about 3424.2092517835. The cubic root of 11725209 is about 227.1817972196.

The spelling of 11725209 in words is "eleven million, seven hundred twenty-five thousand, two hundred nine".