11986555 has 16 divisors (see below), whose sum is σ = 16841664. Its totient is φ = 8017920.

The previous prime is 11986529. The next prime is 11986571. The reversal of 11986555 is 55568911.

It is not a de Polignac number, because 11986555 - 2⁹ = 11986043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2742 + ... + 5611.

It is an arithmetic number, because the mean of its divisors is an integer number (1052604).

Almost surely, 2^11986555 is an apocalyptic number.

11986555 is a deficient number, since it is larger than the sum of its proper divisors (4855109).

11986555 is an equidigital number, since it uses as much as digits as its factorization.

11986555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406.

The product of its digits is 54000, while the sum is 40.

The square root of 11986555 is about 3462.1604526654. The cubic root of 11986555 is about 228.8573127631.

The spelling of 11986555 in words is "eleven million, nine hundred eighty-six thousand, five hundred fifty-five".