8181725 has 12 divisors (see below), whose sum is σ = 10270176. Its totient is φ = 6464880.

The previous prime is 8181697. The next prime is 8181727. The reversal of 8181725 is 5271818.

It is a happy number.

8181725 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8181725 - 2¹⁰ = 8180701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8181691 and 8181700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104 + ... + 4046.

It is an arithmetic number, because the mean of its divisors is an integer number (855848).

Almost surely, 2^8181725 is an apocalyptic number.

It is an amenable number.

8181725 is a deficient number, since it is larger than the sum of its proper divisors (2088451).

8181725 is a wasteful number, since it uses less digits than its factorization.

8181725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036 (or 4031 counting only the distinct ones).

The product of its digits is 4480, while the sum is 32.

The square root of 8181725 is about 2860.3714793712. The cubic root of 8181725 is about 201.5030508931.

The spelling of 8181725 in words is "eight million, one hundred eighty-one thousand, seven hundred twenty-five".