11540909 has 8 divisors (see below), whose sum is σ = 12451320. Its totient is φ = 10656256.

The previous prime is 11540863. The next prime is 11540953. The reversal of 11540909 is 90904511.

It can be written as a sum of positive squares in 4 ways, for example, as 3258025 + 8282884 = 1805^2 + 2878^2 .

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 11540909 - 2⁸ = 11540653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11540989) 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, 5504 + ... + 7305.

It is an arithmetic number, because the mean of its divisors is an integer number (1556415).

Almost surely, 2^11540909 is an apocalyptic number.

It is an amenable number.

11540909 is a deficient number, since it is larger than the sum of its proper divisors (910411).

11540909 is a wasteful number, since it uses less digits than its factorization.

11540909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12879.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 11540909 is about 3397.1913399160. The cubic root of 11540909 is about 225.9852040853.

The spelling of 11540909 in words is "eleven million, five hundred forty thousand, nine hundred nine".