8457842 has 8 divisors (see below), whose sum is σ = 12981936. Its totient is φ = 4130532.

The previous prime is 8457811. The next prime is 8457847. The reversal of 8457842 is 2487548.

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

It is an Ulam number.

It is a d-powerful number, because it can be written as 8 + 4 + 5⁵ + 7² + 8³ + 4⁸ + 2²³ .

It is a junction number, because it is equal to n+sod(n) for n = 8457796 and 8457805.

It is not an unprimeable number, because it can be changed into a prime (8457847) 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, 49088 + ... + 49259.

It is an arithmetic number, because the mean of its divisors is an integer number (1622742).

Almost surely, 2^8457842 is an apocalyptic number.

8457842 is a deficient number, since it is larger than the sum of its proper divisors (4524094).

8457842 is a wasteful number, since it uses less digits than its factorization.

8457842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98392.

The product of its digits is 71680, while the sum is 38.

The square root of 8457842 is about 2908.2369229483. The cubic root of 8457842 is about 203.7447949289.

The spelling of 8457842 in words is "eight million, four hundred fifty-seven thousand, eight hundred forty-two".