11985867 has 16 divisors (see below), whose sum is σ = 18802080. Its totient is φ = 7520256.

The previous prime is 11985859. The next prime is 11985877. The reversal of 11985867 is 76858911.

It is not a de Polignac number, because 11985867 - 2³ = 11985859 is a prime.

It is a super-2 number, since 2×11985867² = 287322015483378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11985847) 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, 12598 + ... + 13515.

It is an arithmetic number, because the mean of its divisors is an integer number (1175130).

Almost surely, 2^11985867 is an apocalyptic number.

11985867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11985867 is a deficient number, since it is larger than the sum of its proper divisors (6816213).

11985867 is a wasteful number, since it uses less digits than its factorization.

11985867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26139 (or 26133 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 11985867 is about 3462.0610913154. The cubic root of 11985867 is about 228.8529340559.

The spelling of 11985867 in words is "eleven million, nine hundred eighty-five thousand, eight hundred sixty-seven".