6545520 has 60 divisors (see below), whose sum is σ = 21984456. Its totient is φ = 1745280.

The previous prime is 6545509. The next prime is 6545531. The reversal of 6545520 is 255456.

6545520 is a `hidden beast` number, since 654 + 5 + 5 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (6545509) and next prime (6545531).

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-3 number, since 3×6545520³ (a number of 21 digits) contains 333 as substring.

It is a zygodrome in base 2.

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, 3826 + ... + 5265.

Almost surely, 2^6545520 is an apocalyptic number.

6545520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6545520 is an abundant number, since it is smaller than the sum of its proper divisors (15438936).

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

6545520 is a wasteful number, since it uses less digits than its factorization.

6545520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110 (or 9101 counting only the distinct ones).

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

The square root of 6545520 is about 2558.4213882783. The cubic root of 6545520 is about 187.0601958590.

Subtracting from 6545520 its reverse (255456), we obtain a square (6290064 = 2508²).

The spelling of 6545520 in words is "six million, five hundred forty-five thousand, five hundred twenty".