842406 has 8 divisors (see below), whose sum is σ = 1684824. Its totient is φ = 280800.

The previous prime is 842399. The next prime is 842407. The reversal of 842406 is 604248.

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

842406 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842406.

It is not an unprimeable number, because it can be changed into a prime (842407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70195 + ... + 70206.

It is an arithmetic number, because the mean of its divisors is an integer number (210603).

2⁸⁴²⁴⁰⁶ is an apocalyptic number.

842406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

842406 is a wasteful number, since it uses less digits than its factorization.

842406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140406.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 842406 is about 917.8267810431. The cubic root of 842406 is about 94.4438792226.

The spelling of 842406 in words is "eight hundred forty-two thousand, four hundred six".