8657842 has 4 divisors (see below), whose sum is σ = 12986766. Its totient is φ = 4328920.

The previous prime is 8657833. The next prime is 8657849. The reversal of 8657842 is 2487568.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8590761 + 67081 = 2931^2 + 259^2 .

It is a d-powerful number, because it can be written as 8⁴ + 6⁴ + 5⁴ + 7² + 8⁶ + 4⁵ + 2²³ .

It is a junction number, because it is equal to n+sod(n) for n = 8657795 and 8657804.

It is not an unprimeable number, because it can be changed into a prime (8657849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2164459 + ... + 2164462.

Almost surely, 2^8657842 is an apocalyptic number.

8657842 is a deficient number, since it is larger than the sum of its proper divisors (4328924).

8657842 is a wasteful number, since it uses less digits than its factorization.

8657842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328923.

The product of its digits is 107520, while the sum is 40.

The square root of 8657842 is about 2942.4211119417. The cubic root of 8657842 is about 205.3382636651.

The spelling of 8657842 in words is "eight million, six hundred fifty-seven thousand, eight hundred forty-two".