806445 has 12 divisors (see below), whose sum is σ = 1397916. Its totient is φ = 430080.

The previous prime is 806389. The next prime is 806447. The reversal of 806445 is 544608.

806445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 110889 + 695556 = 333^2 + 834^2 .

It is not a de Polignac number, because 806445 - 2⁶ = 806381 is a prime.

806445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8916 + ... + 9005.

It is an arithmetic number, because the mean of its divisors is an integer number (116493).

2⁸⁰⁶⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

806445 is a deficient number, since it is larger than the sum of its proper divisors (591471).

806445 is a wasteful number, since it uses less digits than its factorization.

806445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17932 (or 17929 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 806445 is about 898.0228282176. The cubic root of 806445 is about 93.0804021999.

The spelling of 806445 in words is "eight hundred six thousand, four hundred forty-five".