8406605 has 4 divisors (see below), whose sum is σ = 10087932. Its totient is φ = 6725280.

The previous prime is 8406583. The next prime is 8406631. The reversal of 8406605 is 5066048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5354596 + 3052009 = 2314^2 + 1747^2 .

It is not a de Polignac number, because 8406605 - 2¹² = 8402509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840656 + ... + 840665.

It is an arithmetic number, because the mean of its divisors is an integer number (2521983).

Almost surely, 2^8406605 is an apocalyptic number.

It is an amenable number.

8406605 is a deficient number, since it is larger than the sum of its proper divisors (1681327).

8406605 is a wasteful number, since it uses less digits than its factorization.

8406605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681326.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 8406605 is about 2899.4145960866. The cubic root of 8406605 is about 203.3325375465.

The spelling of 8406605 in words is "eight million, four hundred six thousand, six hundred five".