805606 has 4 divisors (see below), whose sum is σ = 1208412. Its totient is φ = 402802.

The previous prime is 805589. The next prime is 805633. The reversal of 805606 is 606508.

805606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

805606 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201400 + ... + 201403.

It is an arithmetic number, because the mean of its divisors is an integer number (302103).

2⁸⁰⁵⁶⁰⁶ is an apocalyptic number.

805606 is a deficient number, since it is larger than the sum of its proper divisors (402806).

805606 is a wasteful number, since it uses less digits than its factorization.

805606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402805.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 805606 is about 897.5555693103. Note that the first 4 decimals coincide. The cubic root of 805606 is about 93.0481116922.

The spelling of 805606 in words is "eight hundred five thousand, six hundred six".