1840225 has 6 divisors (see below), whose sum is σ = 2281910. Its totient is φ = 1472160.

The previous prime is 1840219. The next prime is 1840231. The reversal of 1840225 is 5220481.

It is an interprime number because it is at equal distance from previous prime (1840219) and next prime (1840231).

It can be written as a sum of positive squares in 3 ways, for example, as 12321 + 1827904 = 111^2 + 1352^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1840225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1840196 and 1840205.

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, 36780 + ... + 36829.

2^1840225 is an apocalyptic number.

It is an amenable number.

1840225 is a deficient number, since it is larger than the sum of its proper divisors (441685).

1840225 is an equidigital number, since it uses as much as digits as its factorization.

1840225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73619 (or 73614 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1840225 is about 1356.5489301901. The cubic root of 1840225 is about 122.5435080774.

The spelling of 1840225 in words is "one million, eight hundred forty thousand, two hundred twenty-five".