1085221272 has 32 divisors (see below), whose sum is σ = 2776150080. Its totient is φ = 353327520.

The previous prime is 1085221243. The next prime is 1085221273. The reversal of 1085221272 is 2721225801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085221273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524754 + ... + 526817.

It is an arithmetic number, because the mean of its divisors is an integer number (86754690).

Almost surely, 2^1085221272 is an apocalyptic number.

1085221272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1085221272 is an abundant number, since it is smaller than the sum of its proper divisors (1690928808).

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

1085221272 is a wasteful number, since it uses less digits than its factorization.

1085221272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051623 (or 1051619 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1085221272 is about 32942.6967930678. The cubic root of 1085221272 is about 1027.6362902548.

The spelling of 1085221272 in words is "one billion, eighty-five million, two hundred twenty-one thousand, two hundred seventy-two".