1220000225 has 6 divisors (see below), whose sum is σ = 1512800310. Its totient is φ = 976000160.

The previous prime is 1220000191. The next prime is 1220000231. The reversal of 1220000225 is 5220000221.

It can be written as a sum of positive squares in 3 ways, for example, as 6801664 + 1213198561 = 2608^2 + 34831^2 .

It is not a de Polignac number, because 1220000225 - 2¹⁶ = 1219934689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24399980 + ... + 24400029.

It is an arithmetic number, because the mean of its divisors is an integer number (252133385).

Almost surely, 2^1220000225 is an apocalyptic number.

It is an amenable number.

1220000225 is a deficient number, since it is larger than the sum of its proper divisors (292800085).

1220000225 is an equidigital number, since it uses as much as digits as its factorization.

1220000225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48800019 (or 48800014 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1220000225 is about 34928.5016140114. The cubic root of 1220000225 is about 1068.5297958372.

Adding to 1220000225 its reverse (5220000221), we get a palindrome (6440000446).

The spelling of 1220000225 in words is "one billion, two hundred twenty million, two hundred twenty-five", and thus it is an aban number.