2026181 has 2 divisors, whose sum is σ = 2026182. Its totient is φ = 2026180.

The previous prime is 2026163. The next prime is 2026183. The reversal of 2026181 is 1816202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 217156 = 1345^2 + 466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2026181 is a prime.

It is a super-2 number, since 2×2026181² = 8210818889522, which contains 22 as substring.

Together with 2026183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2026183) 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 as a sum of consecutive naturals, namely, 1013090 + 1013091.

It is an arithmetic number, because the mean of its divisors is an integer number (1013091).

2^2026181 is an apocalyptic number.

It is an amenable number.

2026181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2026181 is an equidigital number, since it uses as much as digits as its factorization.

2026181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2026181 is about 1423.4398476929. The cubic root of 2026181 is about 126.5394899285.

The spelling of 2026181 in words is "two million, twenty-six thousand, one hundred eighty-one".