8442147 has 16 divisors (see below), whose sum is σ = 13164800. Its totient is φ = 4711392.

The previous prime is 8442131. The next prime is 8442151. The reversal of 8442147 is 7412448.

8442147 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8442147 - 2⁴ = 8442131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8442107) 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, 3772 + ... + 5577.

It is an arithmetic number, because the mean of its divisors is an integer number (822800).

Almost surely, 2^8442147 is an apocalyptic number.

8442147 is a deficient number, since it is larger than the sum of its proper divisors (4722653).

8442147 is a wasteful number, since it uses less digits than its factorization.

8442147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9402.

The product of its digits is 7168, while the sum is 30.

The square root of 8442147 is about 2905.5372997090. The cubic root of 8442147 is about 203.6186888999.

The spelling of 8442147 in words is "eight million, four hundred forty-two thousand, one hundred forty-seven".