1808825 has 6 divisors (see below), whose sum is σ = 2242974. Its totient is φ = 1447040.

The previous prime is 1808813. The next prime is 1808831. The reversal of 1808825 is 5288081.

1808825 is nontrivially palindromic in base 4.

1808825 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 3 ways, for example, as 506944 + 1301881 = 712^2 + 1141^2 .

It is not a de Polignac number, because 1808825 - 2⁶ = 1808761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1808791 and 1808800.

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 5 ways as a sum of consecutive naturals, for example, 36152 + ... + 36201.

It is an arithmetic number, because the mean of its divisors is an integer number (373829).

2^1808825 is an apocalyptic number.

It is an amenable number.

1808825 is a deficient number, since it is larger than the sum of its proper divisors (434149).

1808825 is an equidigital number, since it uses as much as digits as its factorization.

1808825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72363 (or 72358 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 1808825 is about 1344.9256485025. The cubic root of 1808825 is about 121.8425138048.

The spelling of 1808825 in words is "one million, eight hundred eight thousand, eight hundred twenty-five".