8181005 has 8 divisors (see below), whose sum is σ = 11219712. Its totient is φ = 5609808.

The previous prime is 8180989. The next prime is 8181007. The reversal of 8181005 is 5001818.

8181005 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8181005 - 2⁴ = 8180989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181007) 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 in 7 ways as a sum of consecutive naturals, for example, 116837 + ... + 116906.

It is an arithmetic number, because the mean of its divisors is an integer number (1402464).

Almost surely, 2^8181005 is an apocalyptic number.

It is an amenable number.

8181005 is a deficient number, since it is larger than the sum of its proper divisors (3038707).

8181005 is a wasteful number, since it uses less digits than its factorization.

8181005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233755.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 8181005 is about 2860.2456188237. The cubic root of 8181005 is about 201.4971398962.

The spelling of 8181005 in words is "eight million, one hundred eighty-one thousand, five".