1220085272 has 16 divisors (see below), whose sum is σ = 2614468560. Its totient is φ = 522893664.

The previous prime is 1220085263. The next prime is 1220085283. The reversal of 1220085272 is 2725800221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10893563 + ... + 10893674.

It is an arithmetic number, because the mean of its divisors is an integer number (163404285).

Almost surely, 2^1220085272 is an apocalyptic number.

It is an amenable number.

1220085272 is an abundant number, since it is smaller than the sum of its proper divisors (1394383288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220085272 is a wasteful number, since it uses less digits than its factorization.

1220085272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21787250 (or 21787246 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 1220085272 is about 34929.7190369462. The cubic root of 1220085272 is about 1068.5546245599.

Adding to 1220085272 its reverse (2725800221), we get a palindrome (3945885493).

The spelling of 1220085272 in words is "one billion, two hundred twenty million, eighty-five thousand, two hundred seventy-two".