8181125 has 8 divisors (see below), whose sum is σ = 10210200. Its totient is φ = 6544800.

The previous prime is 8181119. The next prime is 8181127. The reversal of 8181125 is 5211818.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 8025889 = 394^2 + 2833^2 .

It is not a de Polignac number, because 8181125 - 2¹⁰ = 8180101 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8181094 and 8181103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181127) 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, 32600 + ... + 32849.

It is an arithmetic number, because the mean of its divisors is an integer number (1276275).

Almost surely, 2^8181125 is an apocalyptic number.

It is an amenable number.

8181125 is a deficient number, since it is larger than the sum of its proper divisors (2029075).

8181125 is an equidigital number, since it uses as much as digits as its factorization.

8181125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65464 (or 65454 counting only the distinct ones).

The product of its digits is 640, while the sum is 26.

The square root of 8181125 is about 2860.2665959662. The cubic root of 8181125 is about 201.4981250865.

The spelling of 8181125 in words is "eight million, one hundred eighty-one thousand, one hundred twenty-five".