1242216 has 64 divisors (see below), whose sum is σ = 3542400. Its totient is φ = 408240.

The previous prime is 1242193. The next prime is 1242217. The reversal of 1242216 is 6122421.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242217) 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, 17461 + ... + 17531.

It is an arithmetic number, because the mean of its divisors is an integer number (55350).

2^1242216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771200).

1242216 is an abundant number, since it is smaller than the sum of its proper divisors (2300184).

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

1242216 is an frugal number, since it uses more digits than its factorization.

1242216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 76 counting only the distinct ones).

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

The square root of 1242216 is about 1114.5474417897. The cubic root of 1242216 is about 107.4976671569.

Adding to 1242216 its reverse (6122421), we get a palindrome (7364637).

The spelling of 1242216 in words is "one million, two hundred forty-two thousand, two hundred sixteen".