8643142 has 8 divisors (see below), whose sum is σ = 13090896. Its totient is φ = 4279512.

The previous prime is 8643137. The next prime is 8643143. The reversal of 8643142 is 2413468.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8643142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20773 + ... + 21184.

It is an arithmetic number, because the mean of its divisors is an integer number (1636362).

Almost surely, 2^8643142 is an apocalyptic number.

8643142 is a deficient number, since it is larger than the sum of its proper divisors (4447754).

8643142 is a wasteful number, since it uses less digits than its factorization.

8643142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42062.

The product of its digits is 4608, while the sum is 28.

The square root of 8643142 is about 2939.9221078117. The cubic root of 8643142 is about 205.2219844034.

The spelling of 8643142 in words is "eight million, six hundred forty-three thousand, one hundred forty-two".