1216842 has 32 divisors (see below), whose sum is σ = 2695680. Its totient is φ = 363120.

The previous prime is 1216841. The next prime is 1216847. The reversal of 1216842 is 2486121.

It is not an unprimeable number, because it can be changed into a prime (1216841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6709 + ... + 6887.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2^1216842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347840).

1216842 is an abundant number, since it is smaller than the sum of its proper divisors (1478838).

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

1216842 is a wasteful number, since it uses less digits than its factorization.

1216842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298.

The product of its digits is 768, while the sum is 24.

The square root of 1216842 is about 1103.1056159770. The cubic root of 1216842 is about 106.7606961660.

The spelling of 1216842 in words is "one million, two hundred sixteen thousand, eight hundred forty-two".