11809542 has 8 divisors (see below), whose sum is σ = 23619096. Its totient is φ = 3936512.

The previous prime is 11809541. The next prime is 11809547. The reversal of 11809542 is 24590811.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

11809542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984123 + ... + 984134.

It is an arithmetic number, because the mean of its divisors is an integer number (2952387).

Almost surely, 2^11809542 is an apocalyptic number.

11809542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11809542 is a wasteful number, since it uses less digits than its factorization.

11809542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968262.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 11809542 is about 3436.5014185942. The cubic root of 11809542 is about 227.7251612927.

The spelling of 11809542 in words is "eleven million, eight hundred nine thousand, five hundred forty-two".