1008181 has 2 divisors, whose sum is σ = 1008182. Its totient is φ = 1008180.

The previous prime is 1008157. The next prime is 1008187. The reversal of 1008181 is 1818001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 133956 = 935^2 + 366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1008181 - 2¹¹ = 1006133 is a prime.

It is a super-2 number, since 2×1008181² = 2032857857522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1008187) 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 as a sum of consecutive naturals, namely, 504090 + 504091.

It is an arithmetic number, because the mean of its divisors is an integer number (504091).

2^1008181 is an apocalyptic number.

It is an amenable number.

1008181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008181 is an equidigital number, since it uses as much as digits as its factorization.

1008181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 1008181 is about 1004.0821679524. The cubic root of 1008181 is about 100.2719597087.

It can be divided in two parts, 100 and 8181, that added together give a square (8281 = 91²).

The spelling of 1008181 in words is "one million, eight thousand, one hundred eighty-one".