6455520 has 72 divisors (see below), whose sum is σ = 22034376. Its totient is φ = 1721088.

The previous prime is 6455473. The next prime is 6455521. The reversal of 6455520 is 255546.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6455521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 802 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (306033).

Almost surely, 2^6455520 is an apocalyptic number.

6455520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6455520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11017188).

6455520 is an abundant number, since it is smaller than the sum of its proper divisors (15578856).

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

6455520 is a wasteful number, since it uses less digits than its factorization.

6455520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 6455520 is about 2540.7715363645. The cubic root of 6455520 is about 186.1988854223.

The spelling of 6455520 in words is "six million, four hundred fifty-five thousand, five hundred twenty".