8242745 has 32 divisors (see below), whose sum is σ = 11943936. Its totient is φ = 5342400.

The previous prime is 8242733. The next prime is 8242777. The reversal of 8242745 is 5472428.

It is not a de Polignac number, because 8242745 - 2¹⁰ = 8241721 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76982 + ... + 77088.

It is an arithmetic number, because the mean of its divisors is an integer number (373248).

Almost surely, 2^8242745 is an apocalyptic number.

It is an amenable number.

8242745 is a deficient number, since it is larger than the sum of its proper divisors (3701191).

8242745 is a wasteful number, since it uses less digits than its factorization.

8242745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 17920, while the sum is 32.

The square root of 8242745 is about 2871.0181120989. The cubic root of 8242745 is about 202.0027529606.

The spelling of 8242745 in words is "eight million, two hundred forty-two thousand, seven hundred forty-five".