1802225 has 6 divisors (see below), whose sum is σ = 2234790. Its totient is φ = 1441760.

The previous prime is 1802219. The next prime is 1802231. The reversal of 1802225 is 5222081.

It is an interprime number because it is at equal distance from previous prime (1802219) and next prime (1802231).

It can be written as a sum of positive squares in 3 ways, for example, as 262144 + 1540081 = 512^2 + 1241^2 .

It is not a de Polignac number, because 1802225 - 2¹² = 1798129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1802197 and 1802206.

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, 36020 + ... + 36069.

It is an arithmetic number, because the mean of its divisors is an integer number (372465).

2^1802225 is an apocalyptic number.

It is an amenable number.

1802225 is a deficient number, since it is larger than the sum of its proper divisors (432565).

1802225 is an equidigital number, since it uses as much as digits as its factorization.

1802225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72099 (or 72094 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1802225 is about 1342.4697389513. The cubic root of 1802225 is about 121.6941411234.

It can be divided in two parts, 1802 and 225, that multiplied together give a triangular number (405450 = T₉₀₀).

The spelling of 1802225 in words is "one million, eight hundred two thousand, two hundred twenty-five".