6545920 has 40 divisors (see below), whose sum is σ = 15701004. Its totient is φ = 2617344.

The previous prime is 6545897. The next prime is 6545923. The reversal of 6545920 is 295456.

It can be written as a sum of positive squares in 2 ways, for example, as 6471936 + 73984 = 2544^2 + 272^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (6545923) 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, 1282 + ... + 3838.

Almost surely, 2^6545920 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 6545920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7850502).

6545920 is an abundant number, since it is smaller than the sum of its proper divisors (9155084).

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

6545920 is an equidigital number, since it uses as much as digits as its factorization.

6545920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580 (or 2564 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 6545920 is about 2558.4995602892. The cubic root of 6545920 is about 187.0640062287.

It can be divided in two parts, 6 and 545920, that multiplied together give a triangular number (3275520 = T₂₅₅₉).

The spelling of 6545920 in words is "six million, five hundred forty-five thousand, nine hundred twenty".