12026181 has 4 divisors (see below), whose sum is σ = 16034912. Its totient is φ = 8017452.

The previous prime is 12026173. The next prime is 12026257. The reversal of 12026181 is 18162021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12026181 - 2³ = 12026173 is a prime.

It is a super-2 number, since 2×12026181² = 289258058889522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12026101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004361 + ... + 2004366.

It is an arithmetic number, because the mean of its divisors is an integer number (4008728).

Almost surely, 2^12026181 is an apocalyptic number.

It is an amenable number.

12026181 is a deficient number, since it is larger than the sum of its proper divisors (4008731).

12026181 is an equidigital number, since it uses as much as digits as its factorization.

12026181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008730.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 12026181 is about 3467.8784580778. The cubic root of 12026181 is about 229.1092262576.

The spelling of 12026181 in words is "twelve million, twenty-six thousand, one hundred eighty-one".