11543409 has 12 divisors (see below), whose sum is σ = 16957200. Its totient is φ = 7564824.

The previous prime is 11543381. The next prime is 11543423. The reversal of 11543409 is 90434511.

It is not a de Polignac number, because 11543409 - 2⁹ = 11542897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11543429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10339 + ... + 11400.

It is an arithmetic number, because the mean of its divisors is an integer number (1413100).

Almost surely, 2^11543409 is an apocalyptic number.

It is an amenable number.

11543409 is a deficient number, since it is larger than the sum of its proper divisors (5413791).

11543409 is a wasteful number, since it uses less digits than its factorization.

11543409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21804 (or 21801 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 11543409 is about 3397.5592710062. The cubic root of 11543409 is about 226.0015205996.

The spelling of 11543409 in words is "eleven million, five hundred forty-three thousand, four hundred nine".