11987755 has 16 divisors (see below), whose sum is σ = 15855840. Its totient is φ = 8644608.

The previous prime is 11987753. The next prime is 11987779. The reversal of 11987755 is 55778911.

11987755 = T₃₆₅ + T₃₆₆ + ... + T₄₉₃.

11987755 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11987755 - 2¹ = 11987753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (11987753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651 + ... + 4939.

It is an arithmetic number, because the mean of its divisors is an integer number (990990).

Almost surely, 2^11987755 is an apocalyptic number.

11987755 is a deficient number, since it is larger than the sum of its proper divisors (3868085).

11987755 is a wasteful number, since it uses less digits than its factorization.

11987755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350.

The product of its digits is 88200, while the sum is 43.

The square root of 11987755 is about 3462.3337505215. Note that the first 3 decimals coincide. The cubic root of 11987755 is about 228.8649496421.

The spelling of 11987755 in words is "eleven million, nine hundred eighty-seven thousand, seven hundred fifty-five".