6545220 has 96 divisors (see below), whose sum is σ = 20514816. Its totient is φ = 1545600.

The previous prime is 6545219. The next prime is 6545243. The reversal of 6545220 is 225456.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30915 + ... + 31125.

It is an arithmetic number, because the mean of its divisors is an integer number (213696).

Almost surely, 2^6545220 is an apocalyptic number.

6545220 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 6545220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10257408).

6545220 is an abundant number, since it is smaller than the sum of its proper divisors (13969596).

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

6545220 is a wasteful number, since it uses less digits than its factorization.

6545220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 6545220 is about 2558.3627577027. The cubic root of 6545220 is about 187.0573379798.

The spelling of 6545220 in words is "six million, five hundred forty-five thousand, two hundred twenty".