1222016 has 16 divisors (see below), whose sum is σ = 2434740. Its totient is φ = 610944.

The previous prime is 1222003. The next prime is 1222019. The reversal of 1222016 is 6102221.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4646 + ... + 4901.

2^1222016 is an apocalyptic number.

1222016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1222016 is a deficient number, since it is larger than the sum of its proper divisors (1212724).

1222016 is an frugal number, since it uses more digits than its factorization.

1222016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561 (or 9549 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1222016 is about 1105.4483253414. The cubic root of 1222016 is about 106.9117973447.

Adding to 1222016 its reverse (6102221), we get a palindrome (7324237).

The spelling of 1222016 in words is "one million, two hundred twenty-two thousand, sixteen".