12159886 has 16 divisors (see below), whose sum is σ = 19474560. Its totient is φ = 5677560.

The previous prime is 12159881. The next prime is 12159899. The reversal of 12159886 is 68895121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12159881) 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 7 ways as a sum of consecutive naturals, for example, 445 + ... + 4951.

It is an arithmetic number, because the mean of its divisors is an integer number (1217160).

Almost surely, 2^12159886 is an apocalyptic number.

12159886 is a deficient number, since it is larger than the sum of its proper divisors (7314674).

12159886 is a wasteful number, since it uses less digits than its factorization.

12159886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599.

The product of its digits is 34560, while the sum is 40.

The square root of 12159886 is about 3487.1028089232. The cubic root of 12159886 is about 229.9551645434.

Subtracting from 12159886 its sum of digits (40), we obtain a triangular number (12159846 = T₄₉₃₁).

The spelling of 12159886 in words is "twelve million, one hundred fifty-nine thousand, eight hundred eighty-six".