1818125 has 10 divisors (see below), whose sum is σ = 2272710. Its totient is φ = 1454000.

The previous prime is 1818109. The next prime is 1818151. The reversal of 1818125 is 5218181.

It can be written as a sum of positive squares in 5 ways, for example, as 373321 + 1444804 = 611^2 + 1202^2 .

It is not a de Polignac number, because 1818125 - 2⁴ = 1818109 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1818094 and 1818103.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 830 + ... + 2079.

It is an arithmetic number, because the mean of its divisors is an integer number (227271).

2^1818125 is an apocalyptic number.

It is an amenable number.

1818125 is a deficient number, since it is larger than the sum of its proper divisors (454585).

1818125 is an frugal number, since it uses more digits than its factorization.

1818125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929 (or 2914 counting only the distinct ones).

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

The square root of 1818125 is about 1348.3786560162. The cubic root of 1818125 is about 122.0509730562.

The spelling of 1818125 in words is "one million, eight hundred eighteen thousand, one hundred twenty-five".