1220225 has 6 divisors (see below), whose sum is σ = 1513110. Its totient is φ = 976160.

The previous prime is 1220203. The next prime is 1220239. The reversal of 1220225 is 5220221.

It can be written as a sum of positive squares in 3 ways, for example, as 36481 + 1183744 = 191^2 + 1088^2 .

It is not a de Polignac number, because 1220225 - 2¹⁴ = 1203841 is a prime.

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, 24380 + ... + 24429.

It is an arithmetic number, because the mean of its divisors is an integer number (252185).

2^1220225 is an apocalyptic number.

It is an amenable number.

1220225 is a deficient number, since it is larger than the sum of its proper divisors (292885).

1220225 is an equidigital number, since it uses as much as digits as its factorization.

1220225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48819 (or 48814 counting only the distinct ones).

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

The square root of 1220225 is about 1104.6379497374. The cubic root of 1220225 is about 106.8595414414.

Adding to 1220225 its reverse (5220221), we get a palindrome (6440446).

The spelling of 1220225 in words is "one million, two hundred twenty thousand, two hundred twenty-five".