11540409 has 8 divisors (see below), whose sum is σ = 15404832. Its totient is φ = 7684800.

The previous prime is 11540387. The next prime is 11540413. The reversal of 11540409 is 90404511.

11540409 is digitally balanced in base 2, base 3 and base 4, because in such bases 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 11540409 - 2¹¹ = 11538361 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11540479) 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, 2002 + ... + 5204.

It is an arithmetic number, because the mean of its divisors is an integer number (1925604).

Almost surely, 2^11540409 is an apocalyptic number.

It is an amenable number.

11540409 is a deficient number, since it is larger than the sum of its proper divisors (3864423).

11540409 is a wasteful number, since it uses less digits than its factorization.

11540409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 11540409 is about 3397.1177489160. The cubic root of 11540409 is about 225.9819404996.

The spelling of 11540409 in words is "eleven million, five hundred forty thousand, four hundred nine".