1216242 has 32 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 399600.

The previous prime is 1216213. The next prime is 1216249. The reversal of 1216242 is 2426121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1216249) 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 15 ways as a sum of consecutive naturals, for example, 5343 + ... + 5565.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2^1216242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370880).

1216242 is an abundant number, since it is smaller than the sum of its proper divisors (1525518).

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

1216242 is a wasteful number, since it uses less digits than its factorization.

1216242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 329 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 1216242 is about 1102.8336229912. The cubic root of 1216242 is about 106.7431461064.

The spelling of 1216242 in words is "one million, two hundred sixteen thousand, two hundred forty-two".