1220825 has 12 divisors (see below), whose sum is σ = 1547520. Its totient is φ = 954960.

The previous prime is 1220819. The next prime is 1220833. The reversal of 1220825 is 5280221.

It is not a de Polignac number, because 1220825 - 2⁶ = 1220761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220797 and 1220806.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 656 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (128960).

2^1220825 is an apocalyptic number.

It is an amenable number.

1220825 is a deficient number, since it is larger than the sum of its proper divisors (326695).

1220825 is a wasteful number, since it uses less digits than its factorization.

1220825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1091 counting only the distinct ones).

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

The square root of 1220825 is about 1104.9094985563. The cubic root of 1220825 is about 106.8770532989.

The spelling of 1220825 in words is "one million, two hundred twenty thousand, eight hundred twenty-five".