8442745 has 16 divisors (see below), whose sum is σ = 10745280. Its totient is φ = 6350400.

The previous prime is 8442713. The next prime is 8442767. The reversal of 8442745 is 5472448.

It is a happy number.

It is not a de Polignac number, because 8442745 - 2⁵ = 8442713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8442745.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16950 + ... + 17440.

It is an arithmetic number, because the mean of its divisors is an integer number (671580).

Almost surely, 2^8442745 is an apocalyptic number.

It is an amenable number.

8442745 is a deficient number, since it is larger than the sum of its proper divisors (2302535).

8442745 is a wasteful number, since it uses less digits than its factorization.

8442745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its digits is 35840, while the sum is 34.

The square root of 8442745 is about 2905.6402048430. The cubic root of 8442745 is about 203.6234965671.

The spelling of 8442745 in words is "eight million, four hundred forty-two thousand, seven hundred forty-five".