6545421 has 16 divisors (see below), whose sum is σ = 9768000. Its totient is φ = 4331664.

The previous prime is 6545381. The next prime is 6545423. The reversal of 6545421 is 1245456.

6545421 is a `hidden beast` number, since 654 + 5 + 4 + 2 + 1 = 666.

6545421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6545421 - 2⁷ = 6545293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3210 + ... + 4836.

It is an arithmetic number, because the mean of its divisors is an integer number (610500).

Almost surely, 2^6545421 is an apocalyptic number.

It is an amenable number.

6545421 is a deficient number, since it is larger than the sum of its proper divisors (3222579).

6545421 is a wasteful number, since it uses less digits than its factorization.

6545421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785 (or 1779 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 6545421 is about 2558.4020403369. The cubic root of 6545421 is about 187.0592527685.

The spelling of 6545421 in words is "six million, five hundred forty-five thousand, four hundred twenty-one".