1228625 has 8 divisors (see below), whose sum is σ = 1533480. Its totient is φ = 982800.

The previous prime is 1228613. The next prime is 1228631. The reversal of 1228625 is 5268221.

It can be written as a sum of positive squares in 4 ways, for example, as 961 + 1227664 = 31^2 + 1108^2 .

It is not a de Polignac number, because 1228625 - 2¹² = 1224529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1228594 and 1228603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4790 + ... + 5039.

It is an arithmetic number, because the mean of its divisors is an integer number (191685).

2^1228625 is an apocalyptic number.

It is an amenable number.

1228625 is a deficient number, since it is larger than the sum of its proper divisors (304855).

1228625 is an frugal number, since it uses more digits than its factorization.

1228625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9844 (or 9834 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 1228625 is about 1108.4335794264. The cubic root of 1228625 is about 107.1041871031.

The spelling of 1228625 in words is "one million, two hundred twenty-eight thousand, six hundred twenty-five".