1225828 has 6 divisors (see below), whose sum is σ = 2145206. Its totient is φ = 612912.

The previous prime is 1225817. The next prime is 1225849. The reversal of 1225828 is 8285221.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 209764 = 1008^2 + 458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1225796 and 1225805.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153225 + ... + 153232.

2^1225828 is an apocalyptic number.

It is an amenable number.

1225828 is a deficient number, since it is larger than the sum of its proper divisors (919378).

1225828 is a wasteful number, since it uses less digits than its factorization.

1225828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306461 (or 306459 counting only the distinct ones).

The product of its digits is 2560, while the sum is 28.

The square root of 1225828 is about 1107.1711701449. The cubic root of 1225828 is about 107.0228501000.

The spelling of 1225828 in words is "one million, two hundred twenty-five thousand, eight hundred twenty-eight".