6506409 has 16 divisors (see below), whose sum is σ = 10677632. Its totient is φ = 3431808.

The previous prime is 6506399. The next prime is 6506429. The reversal of 6506409 is 9046056.

It is not a de Polignac number, because 6506409 - 2¹¹ = 6504361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6506429) 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, 11644 + ... + 12189.

It is an arithmetic number, because the mean of its divisors is an integer number (667352).

Almost surely, 2^6506409 is an apocalyptic number.

It is an amenable number.

6506409 is a deficient number, since it is larger than the sum of its proper divisors (4171223).

6506409 is a wasteful number, since it uses less digits than its factorization.

6506409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23856.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 6506409 is about 2550.7663554312. The cubic root of 6506409 is about 186.6868752923.

The spelling of 6506409 in words is "six million, five hundred six thousand, four hundred nine".