11987742 has 16 divisors (see below), whose sum is σ = 25819920. Its totient is φ = 3688512.

The previous prime is 11987719. The next prime is 11987743. The reversal of 11987742 is 24778911.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 11987742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987743) 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, 76767 + ... + 76922.

It is an arithmetic number, because the mean of its divisors is an integer number (1613745).

Almost surely, 2^11987742 is an apocalyptic number.

11987742 is an abundant number, since it is smaller than the sum of its proper divisors (13832178).

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

11987742 is a wasteful number, since it uses less digits than its factorization.

11987742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153707.

The product of its digits is 28224, while the sum is 39.

The square root of 11987742 is about 3462.3318731745. The cubic root of 11987742 is about 228.8648669120.

The spelling of 11987742 in words is "eleven million, nine hundred eighty-seven thousand, seven hundred forty-two".