6424720 has 20 divisors (see below), whose sum is σ = 14937660. Its totient is φ = 2569856.

The previous prime is 6424699. The next prime is 6424723. The reversal of 6424720 is 274246.

6424720 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4016016 + 2408704 = 2004^2 + 1552^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (6424723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40075 + ... + 40234.

It is an arithmetic number, because the mean of its divisors is an integer number (746883).

Almost surely, 2^6424720 is an apocalyptic number.

It is an amenable number.

6424720 is an abundant number, since it is smaller than the sum of its proper divisors (8512940).

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

6424720 is a wasteful number, since it uses less digits than its factorization.

6424720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80322 (or 80316 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 6424720 is about 2534.7031384365. The cubic root of 6424720 is about 185.9022880618.

Adding to 6424720 its reverse (274246), we get a palindrome (6698966).

The spelling of 6424720 in words is "six million, four hundred twenty-four thousand, seven hundred twenty".