2421216 has 72 divisors (see below), whose sum is σ = 7875504. Its totient is φ = 691200.

The previous prime is 2421203. The next prime is 2421229. The reversal of 2421216 is 6121242.

It is an interprime number because it is at equal distance from previous prime (2421203) and next prime (2421229).

It is a tau number, because it is divible by the number of its divisors (72).

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1416 + ... + 2616.

It is an arithmetic number, because the mean of its divisors is an integer number (109382).

2^2421216 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 2421216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3937752).

2421216 is an abundant number, since it is smaller than the sum of its proper divisors (5454288).

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

2421216 is a wasteful number, since it uses less digits than its factorization.

2421216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1213 counting only the distinct ones).

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

The square root of 2421216 is about 1556.0257067285. The cubic root of 2421216 is about 134.2799523277.

Adding to 2421216 its reverse (6121242), we get a palindrome (8542458).

The spelling of 2421216 in words is "two million, four hundred twenty-one thousand, two hundred sixteen".