6409545 has 16 divisors (see below), whose sum is σ = 10333440. Its totient is φ = 3392384.

The previous prime is 6409523. The next prime is 6409549. The reversal of 6409545 is 5459046.

It is a cyclic number.

It is not a de Polignac number, because 6409545 - 2¹¹ = 6407497 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

6409545 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496 + ... + 3614.

It is an arithmetic number, because the mean of its divisors is an integer number (645840).

Almost surely, 2^6409545 is an apocalyptic number.

It is an amenable number.

6409545 is a deficient number, since it is larger than the sum of its proper divisors (3923895).

6409545 is a wasteful number, since it uses less digits than its factorization.

6409545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 6409545 is about 2531.7079215423. The cubic root of 6409545 is about 185.7558074249.

The spelling of 6409545 in words is "six million, four hundred nine thousand, five hundred forty-five".