2061181 has 2 divisors, whose sum is σ = 2061182. Its totient is φ = 2061180.

The previous prime is 2061179. The next prime is 2061187. The reversal of 2061181 is 1811602.

2061181 is nontrivially palindromic in base 4.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1585081 + 476100 = 1259^2 + 690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061181 - 2¹ = 2061179 is a prime.

It is a super-2 number, since 2×2061181² = 8496934229522, which contains 22 as substring.

Together with 2061179, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₁₅₃₁₅₄ and since 2061181 and 153154 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030590 + 1030591.

It is an arithmetic number, because the mean of its divisors is an integer number (1030591).

2^2061181 is an apocalyptic number.

It is an amenable number.

2061181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061181 is an equidigital number, since it uses as much as digits as its factorization.

2061181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 2061181 is about 1435.6813713356. The cubic root of 2061181 is about 127.2639435960.

Adding to 2061181 its reverse (1811602), we get a palindrome (3872783).

The spelling of 2061181 in words is "two million, sixty-one thousand, one hundred eighty-one".