8181441 has 12 divisors (see below), whose sum is σ = 11898900. Its totient is φ = 5416800.

The previous prime is 8181421. The next prime is 8181449. The reversal of 8181441 is 1441818.

It can be written as a sum of positive squares in 2 ways, for example, as 2873025 + 5308416 = 1695^2 + 2304^2 .

It is not a de Polignac number, because 8181441 - 2⁶ = 8181377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8181449) 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 11 ways as a sum of consecutive naturals, for example, 1710 + ... + 4391.

It is an arithmetic number, because the mean of its divisors is an integer number (991575).

Almost surely, 2^8181441 is an apocalyptic number.

It is an amenable number.

8181441 is a deficient number, since it is larger than the sum of its proper divisors (3717459).

8181441 is a wasteful number, since it uses less digits than its factorization.

8181441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256 (or 6253 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 8181441 is about 2860.3218350388. The cubic root of 8181441 is about 201.5007193746.

The spelling of 8181441 in words is "eight million, one hundred eighty-one thousand, four hundred forty-one".