1000225 has 6 divisors (see below), whose sum is σ = 1240310. Its totient is φ = 800160.

The previous prime is 1000213. The next prime is 1000231. The reversal of 1000225 is 5220001.

It can be written as a sum of positive squares in 3 ways, for example, as 345744 + 654481 = 588^2 + 809^2 .

It is not a de Polignac number, because 1000225 - 2⁵ = 1000193 is a prime.

1000225 is a modest number, since divided by 225 gives 100 as remainder.

It is a nialpdrome in base 16.

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, 19980 + ... + 20029.

2^1000225 is an apocalyptic number.

It is an amenable number.

1000225 is a deficient number, since it is larger than the sum of its proper divisors (240085).

1000225 is an equidigital number, since it uses as much as digits as its factorization.

1000225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40019 (or 40014 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1000225 is about 1000.1124936726. The cubic root of 1000225 is about 100.0074994376.

Adding to 1000225 its reverse (5220001), we get a palindrome (6220226).

It can be divided in two parts, 1000 and 225, that added together give a triangular number (1225 = T₄₉).

The spelling of 1000225 in words is "one million, two hundred twenty-five", and thus it is an aban number.