1216122 has 16 divisors (see below), whose sum is σ = 2449632. Its totient is φ = 402480.

The previous prime is 1216109. The next prime is 1216123. The reversal of 1216122 is 2216121.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1216123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (153102).

2^1216122 is an apocalyptic number.

1216122 is an abundant number, since it is smaller than the sum of its proper divisors (1233510).

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

1216122 is a wasteful number, since it uses less digits than its factorization.

1216122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453.

The product of its digits is 48, while the sum is 15.

The square root of 1216122 is about 1102.7792163439. The cubic root of 1216122 is about 106.7396354019.

Subtracting 1216122 from its reverse (2216121), we obtain a palindrome (999999).

The spelling of 1216122 in words is "one million, two hundred sixteen thousand, one hundred twenty-two".