7215420 has 48 divisors (see below), whose sum is σ = 20593440. Its totient is φ = 1886976.

The previous prime is 7215419. The next prime is 7215427. The reversal of 7215420 is 245127.

7215420 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7215427) 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, 2046 + ... + 4314.

It is an arithmetic number, because the mean of its divisors is an integer number (429030).

Almost surely, 2^7215420 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 7215420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10296720).

7215420 is an abundant number, since it is smaller than the sum of its proper divisors (13378020).

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

7215420 is a wasteful number, since it uses less digits than its factorization.

7215420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2332 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7215420 is about 2686.1533835580. The cubic root of 7215420 is about 193.2356290570.

The spelling of 7215420 in words is "seven million, two hundred fifteen thousand, four hundred twenty".