11867859 has 12 divisors (see below), whose sum is σ = 17182152. Its totient is φ = 7893600.

The previous prime is 11867831. The next prime is 11867893. The reversal of 11867859 is 95876811.

It is not a de Polignac number, because 11867859 - 2⁵ = 11867827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11867809) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3424 + ... + 5954.

It is an arithmetic number, because the mean of its divisors is an integer number (1431846).

Almost surely, 2^11867859 is an apocalyptic number.

11867859 is a deficient number, since it is larger than the sum of its proper divisors (5314293).

11867859 is a wasteful number, since it uses less digits than its factorization.

11867859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058 (or 3055 counting only the distinct ones).

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

The square root of 11867859 is about 3444.9759070275. The cubic root of 11867859 is about 228.0993911079.

It can be divided in two parts, 1186 and 7859, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 11867859 in words is "eleven million, eight hundred sixty-seven thousand, eight hundred fifty-nine".