1216112 has 30 divisors (see below), whose sum is σ = 2512488. Its totient is φ = 570112.

The previous prime is 1216109. The next prime is 1216123. The reversal of 1216112 is 2116121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4493 + ... + 4755.

2^1216112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256244).

1216112 is an abundant number, since it is smaller than the sum of its proper divisors (1296376).

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

1216112 is a wasteful number, since it uses less digits than its factorization.

1216112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 282 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 1216112 is about 1102.7746823354. The cubic root of 1216112 is about 106.7393428328.

Subtracting 1216112 from its reverse (2116121), we obtain a palindrome (900009).

The spelling of 1216112 in words is "one million, two hundred sixteen thousand, one hundred twelve".