1228025 has 6 divisors (see below), whose sum is σ = 1522782. Its totient is φ = 982400.

The previous prime is 1228021. The next prime is 1228091. The reversal of 1228025 is 5208221.

It can be written as a sum of positive squares in 3 ways, for example, as 361 + 1227664 = 19^2 + 1108^2 .

It is not a de Polignac number, because 1228025 - 2² = 1228021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1227988 and 1228006.

It is not an unprimeable number, because it can be changed into a prime (1228021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24536 + ... + 24585.

It is an arithmetic number, because the mean of its divisors is an integer number (253797).

2^1228025 is an apocalyptic number.

It is an amenable number.

1228025 is a deficient number, since it is larger than the sum of its proper divisors (294757).

1228025 is an equidigital number, since it uses as much as digits as its factorization.

1228025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49131 (or 49126 counting only the distinct ones).

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

The square root of 1228025 is about 1108.1628941631. The cubic root of 1228025 is about 107.0867494591.

The spelling of 1228025 in words is "one million, two hundred twenty-eight thousand, twenty-five".