8742147 has 8 divisors (see below), whose sum is σ = 12269760. Its totient is φ = 5521320.

The previous prime is 8742133. The next prime is 8742157. The reversal of 8742147 is 7412478.

8742147 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8742147 - 2¹⁰ = 8741123 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8742157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76629 + ... + 76742.

It is an arithmetic number, because the mean of its divisors is an integer number (1533720).

Almost surely, 2^8742147 is an apocalyptic number.

8742147 is a deficient number, since it is larger than the sum of its proper divisors (3527613).

8742147 is a wasteful number, since it uses less digits than its factorization.

8742147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153393.

The product of its digits is 12544, while the sum is 33.

The square root of 8742147 is about 2956.7121943131. The cubic root of 8742147 is about 206.0025999609.

The spelling of 8742147 in words is "eight million, seven hundred forty-two thousand, one hundred forty-seven".