8243745 has 16 divisors (see below), whose sum is σ = 13497792. Its totient is φ = 4294080.

The previous prime is 8243731. The next prime is 8243749. The reversal of 8243745 is 5473428.

8243745 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8243745 - 2⁵ = 8243713 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8 + 2¹⁹ + 4⁴ + 3⁵ + 7⁸ + 4⁵ + 5⁹ .

8243745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8243749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5746 + ... + 7035.

It is an arithmetic number, because the mean of its divisors is an integer number (843612).

Almost surely, 2^8243745 is an apocalyptic number.

It is an amenable number.

8243745 is a deficient number, since it is larger than the sum of its proper divisors (5254047).

8243745 is a wasteful number, since it uses less digits than its factorization.

8243745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12832.

The product of its digits is 26880, while the sum is 33.

The square root of 8243745 is about 2871.1922610651. The cubic root of 8243745 is about 202.0109215413.

The spelling of 8243745 in words is "eight million, two hundred forty-three thousand, seven hundred forty-five".