4243805 has 4 divisors (see below), whose sum is σ = 5092572. Its totient is φ = 3395040.

The previous prime is 4243793. The next prime is 4243819. The reversal of 4243805 is 5083424.

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 2292196 + 1951609 = 1514^2 + 1397^2 .

It is not a de Polignac number, because 4243805 - 2⁸ = 4243549 is a prime.

It is an Ulam number.

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 3 ways as a sum of consecutive naturals, for example, 424376 + ... + 424385.

It is an arithmetic number, because the mean of its divisors is an integer number (1273143).

Almost surely, 2^4243805 is an apocalyptic number.

It is an amenable number.

4243805 is a deficient number, since it is larger than the sum of its proper divisors (848767).

4243805 is an equidigital number, since it uses as much as digits as its factorization.

4243805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848766.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4243805 is about 2060.0497566806. The cubic root of 4243805 is about 161.9018482820.

The spelling of 4243805 in words is "four million, two hundred forty-three thousand, eight hundred five".