1220325285 has 8 divisors (see below), whose sum is σ = 1952520480. Its totient is φ = 650840144.

The previous prime is 1220325277. The next prime is 1220325317. The reversal of 1220325285 is 5825230221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220325285 - 2³ = 1220325277 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40677495 + ... + 40677524.

It is an arithmetic number, because the mean of its divisors is an integer number (244065060).

Almost surely, 2^1220325285 is an apocalyptic number.

1220325285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220325285 is a deficient number, since it is larger than the sum of its proper divisors (732195195).

1220325285 is an equidigital number, since it uses as much as digits as its factorization.

1220325285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81355027.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1220325285 is about 34933.1545240335. The cubic root of 1220325285 is about 1068.6246880196.

The spelling of 1220325285 in words is "one billion, two hundred twenty million, three hundred twenty-five thousand, two hundred eighty-five".