1165216 has 24 divisors (see below), whose sum is σ = 2471364. Its totient is φ = 537600.

The previous prime is 1165211. The next prime is 1165217. The reversal of 1165216 is 6125611.

It can be written as a sum of positive squares in 2 ways, for example, as 1123600 + 41616 = 1060^2 + 204^2 .

It is not an unprimeable number, because it can be changed into a prime (1165211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985 + ... + 1816.

2^1165216 is an apocalyptic number.

1165216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1165216 is an abundant number, since it is smaller than the sum of its proper divisors (1306148).

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

1165216 is a wasteful number, since it uses less digits than its factorization.

1165216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824 (or 2816 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 1165216 is about 1079.4517126764. The cubic root of 1165216 is about 105.2290088525.

The spelling of 1165216 in words is "one million, one hundred sixty-five thousand, two hundred sixteen".