1220564225 has 6 divisors (see below), whose sum is σ = 1513499670. Its totient is φ = 976451360.

The previous prime is 1220564221. The next prime is 1220564227. The reversal of 1220564225 is 5224650221.

1220564225 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1227664 + 1219336561 = 1108^2 + 34919^2 .

It is not a de Polignac number, because 1220564225 - 2² = 1220564221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220564221) 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, 24411260 + ... + 24411309.

It is an arithmetic number, because the mean of its divisors is an integer number (252249945).

Almost surely, 2^1220564225 is an apocalyptic number.

It is an amenable number.

1220564225 is a deficient number, since it is larger than the sum of its proper divisors (292935445).

1220564225 is an equidigital number, since it uses as much as digits as its factorization.

1220564225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48822579 (or 48822574 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1220564225 is about 34936.5743168960. The cubic root of 1220564225 is about 1068.6944291295.

The spelling of 1220564225 in words is "one billion, two hundred twenty million, five hundred sixty-four thousand, two hundred twenty-five".