6405605 has 8 divisors (see below), whose sum is σ = 7706112. Its totient is φ = 5111568.

The previous prime is 6405593. The next prime is 6405629. The reversal of 6405605 is 5065046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6405605 - 2⁶ = 6405541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932 + ... + 3698.

It is an arithmetic number, because the mean of its divisors is an integer number (963264).

Almost surely, 2^6405605 is an apocalyptic number.

It is an amenable number.

6405605 is a deficient number, since it is larger than the sum of its proper divisors (1300507).

6405605 is a wasteful number, since it uses less digits than its factorization.

6405605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 6405605 is about 2530.9296710893. The cubic root of 6405605 is about 185.7177377493.

The spelling of 6405605 in words is "six million, four hundred five thousand, six hundred five".