1812025 has 6 divisors (see below), whose sum is σ = 2246942. Its totient is φ = 1449600.

The previous prime is 1811993. The next prime is 1812037. The reversal of 1812025 is 5202181.

It can be written as a sum of positive squares in 3 ways, for example, as 59049 + 1752976 = 243^2 + 1324^2 .

It is not a de Polignac number, because 1812025 - 2⁵ = 1811993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1811993 and 1812011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36216 + ... + 36265.

2^1812025 is an apocalyptic number.

It is an amenable number.

1812025 is a deficient number, since it is larger than the sum of its proper divisors (434917).

1812025 is an equidigital number, since it uses as much as digits as its factorization.

1812025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72491 (or 72486 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1812025 is about 1346.1147796529. The cubic root of 1812025 is about 121.9143221790.

It can be divided in two parts, 18120 and 25, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 1812025 in words is "one million, eight hundred twelve thousand, twenty-five".