11987165 has 8 divisors (see below), whose sum is σ = 14430048. Its totient is φ = 9559440.

The previous prime is 11987147. The next prime is 11987167. The reversal of 11987165 is 56178911.

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

It is not a de Polignac number, because 11987165 - 2¹⁴ = 11970781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987167) 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, 1967 + ... + 5276.

It is an arithmetic number, because the mean of its divisors is an integer number (1803756).

Almost surely, 2^11987165 is an apocalyptic number.

It is an amenable number.

11987165 is a deficient number, since it is larger than the sum of its proper divisors (2442883).

11987165 is an equidigital number, since it uses as much as digits as its factorization.

11987165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7579.

The product of its digits is 15120, while the sum is 38.

The square root of 11987165 is about 3462.2485468262. The cubic root of 11987165 is about 228.8611949069.

The spelling of 11987165 in words is "eleven million, nine hundred eighty-seven thousand, one hundred sixty-five".