1108181 has 2 divisors, whose sum is σ = 1108182. Its totient is φ = 1108180.

The previous prime is 1108171. The next prime is 1108201. The reversal of 1108181 is 1818011.

It is an a-pointer prime, because the next prime (1108201) can be obtained adding 1108181 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940900 + 167281 = 970^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1108181 - 2¹⁰ = 1107157 is a prime.

It is a super-2 number, since 2×1108181² = 2456130257522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1108171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554090 + 554091.

It is an arithmetic number, because the mean of its divisors is an integer number (554091).

2^1108181 is an apocalyptic number.

It is an amenable number.

1108181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108181 is an equidigital number, since it uses as much as digits as its factorization.

1108181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

The square root of 1108181 is about 1052.7017621340. The cubic root of 1108181 is about 103.4832913509.

The spelling of 1108181 in words is "one million, one hundred eight thousand, one hundred eighty-one".