1165222272 has 64 divisors (see below), whose sum is σ = 3258043200. Its totient is φ = 367962624.

The previous prime is 1165222249. The next prime is 1165222283. The reversal of 1165222272 is 2722225611.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

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, 72558 + ... + 87149.

It is an arithmetic number, because the mean of its divisors is an integer number (50906925).

Almost surely, 2^1165222272 is an apocalyptic number.

1165222272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1165222272 is an abundant number, since it is smaller than the sum of its proper divisors (2092820928).

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

1165222272 is a wasteful number, since it uses less digits than its factorization.

1165222272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159743 (or 159731 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 1165222272 is about 34135.3522319603. The cubic root of 1165222272 is about 1052.2919765734.

Adding to 1165222272 its reverse (2722225611), we get a palindrome (3887447883).

The spelling of 1165222272 in words is "one billion, one hundred sixty-five million, two hundred twenty-two thousand, two hundred seventy-two".