11989542 has 8 divisors (see below), whose sum is σ = 23979096. Its totient is φ = 3996512.

The previous prime is 11989531. The next prime is 11989543. The reversal of 11989542 is 24598911.

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

11989542 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 11989542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999123 + ... + 999134.

It is an arithmetic number, because the mean of its divisors is an integer number (2997387).

Almost surely, 2^11989542 is an apocalyptic number.

11989542 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.

11989542 is a wasteful number, since it uses less digits than its factorization.

11989542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998262.

The product of its digits is 25920, while the sum is 39.

The square root of 11989542 is about 3462.5918038371. The cubic root of 11989542 is about 228.8763212833.

The spelling of 11989542 in words is "eleven million, nine hundred eighty-nine thousand, five hundred forty-two".