11825209 has 6 divisors (see below), whose sum is σ = 12998090. Its totient is φ = 10750080.

The previous prime is 11825207. The next prime is 11825213. The reversal of 11825209 is 90252811.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 4141225 = 2772^2 + 2035^2 .

It is not a de Polignac number, because 11825209 - 2¹ = 11825207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11825207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48744 + ... + 48985.

Almost surely, 2^11825209 is an apocalyptic number.

It is an amenable number.

11825209 is a deficient number, since it is larger than the sum of its proper divisors (1172881).

11825209 is an equidigital number, since it uses as much as digits as its factorization.

11825209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97751 (or 97740 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 11825209 is about 3438.7801616271. The cubic root of 11825209 is about 227.8258198266.

The spelling of 11825209 in words is "eleven million, eight hundred twenty-five thousand, two hundred nine".