11988105 has 16 divisors (see below), whose sum is σ = 19414080. Its totient is φ = 6315968.

The previous prime is 11988091. The next prime is 11988121. The reversal of 11988105 is 50188911.

11988105 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11988105 - 2⁷ = 11987977 is a prime.

It is a super-2 number, since 2×11988105² = 287429322982050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3570 + ... + 6059.

It is an arithmetic number, because the mean of its divisors is an integer number (1213380).

Almost surely, 2^11988105 is an apocalyptic number.

11988105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11988105 is a deficient number, since it is larger than the sum of its proper divisors (7425975).

11988105 is an equidigital number, since it uses as much as digits as its factorization.

11988105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720.

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 11988105 is about 3462.3842940956. The cubic root of 11988105 is about 228.8671769692.

The spelling of 11988105 in words is "eleven million, nine hundred eighty-eight thousand, one hundred five".