8172243 has 12 divisors (see below), whose sum is σ = 12092808. Its totient is φ = 5315040.

The previous prime is 8172233. The next prime is 8172253. The reversal of 8172243 is 3422718.

It is an interprime number because it is at equal distance from previous prime (8172233) and next prime (8172253).

It is not a de Polignac number, because 8172243 - 2⁵ = 8172211 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

8172243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8172233) 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, 10705 + ... + 11442.

It is an arithmetic number, because the mean of its divisors is an integer number (1007734).

Almost surely, 2^8172243 is an apocalyptic number.

8172243 is a deficient number, since it is larger than the sum of its proper divisors (3920565).

8172243 is a wasteful number, since it uses less digits than its factorization.

8172243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22194 (or 22191 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 8172243 is about 2858.7135218486. The cubic root of 8172243 is about 201.4251785412.

The spelling of 8172243 in words is "eight million, one hundred seventy-two thousand, two hundred forty-three".