11365409 has 8 divisors (see below), whose sum is σ = 12502560. Its totient is φ = 10330980.

The previous prime is 11365391. The next prime is 11365423. The reversal of 11365409 is 90456311.

It is not a de Polignac number, because 11365409 - 2⁸ = 11365153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11365309) 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 7 ways as a sum of consecutive naturals, for example, 2939 + ... + 5600.

It is an arithmetic number, because the mean of its divisors is an integer number (1562820).

Almost surely, 2^11365409 is an apocalyptic number.

It is an amenable number.

11365409 is a deficient number, since it is larger than the sum of its proper divisors (1137151).

11365409 is an frugal number, since it uses more digits than its factorization.

11365409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8572 (or 8550 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 11365409 is about 3371.2622265258. The cubic root of 11365409 is about 224.8338460561.

The spelling of 11365409 in words is "eleven million, three hundred sixty-five thousand, four hundred nine".