12220825 has 6 divisors (see below), whose sum is σ = 15153854. Its totient is φ = 9776640.

The previous prime is 12220823. The next prime is 12220849. The reversal of 12220825 is 52802221.

It can be written as a sum of positive squares in 3 ways, for example, as 1547536 + 10673289 = 1244^2 + 3267^2 .

It is not a de Polignac number, because 12220825 - 2¹ = 12220823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220796 and 12220805.

It is not an unprimeable number, because it can be changed into a prime (12220823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244392 + ... + 244441.

Almost surely, 2^12220825 is an apocalyptic number.

It is an amenable number.

12220825 is a deficient number, since it is larger than the sum of its proper divisors (2933029).

12220825 is an equidigital number, since it uses as much as digits as its factorization.

12220825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488843 (or 488838 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 12220825 is about 3495.8296583215. The cubic root of 12220825 is about 230.3386630323.

The spelling of 12220825 in words is "twelve million, two hundred twenty thousand, eight hundred twenty-five".