1216443 has 8 divisors (see below), whose sum is σ = 1645056. Its totient is φ = 799400.

The previous prime is 1216441. The next prime is 1216451. The reversal of 1216443 is 3446121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216443 - 2¹ = 1216441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216441) 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, 2643 + ... + 3068.

It is an arithmetic number, because the mean of its divisors is an integer number (205632).

2^1216443 is an apocalyptic number.

1216443 is a deficient number, since it is larger than the sum of its proper divisors (428613).

1216443 is an equidigital number, since it uses as much as digits as its factorization.

1216443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5785.

The product of its digits is 576, while the sum is 21.

The square root of 1216443 is about 1102.9247481129. The cubic root of 1216443 is about 106.7490260192.

The spelling of 1216443 in words is "one million, two hundred sixteen thousand, four hundred forty-three".