842455 has 4 divisors (see below), whose sum is σ = 1010952. Its totient is φ = 673960.

The previous prime is 842449. The next prime is 842473. The reversal of 842455 is 554248.

842455 = T₅₇₈ + T₅₇₉ + ... + T₅₈₂.

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

It is not a de Polignac number, because 842455 - 2³ = 842447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84241 + ... + 84250.

It is an arithmetic number, because the mean of its divisors is an integer number (252738).

2⁸⁴²⁴⁵⁵ is an apocalyptic number.

842455 is a deficient number, since it is larger than the sum of its proper divisors (168497).

842455 is a wasteful number, since it uses less digits than its factorization.

842455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168496.

The product of its digits is 6400, while the sum is 28.

The square root of 842455 is about 917.8534741450. The cubic root of 842455 is about 94.4457103508.

The spelling of 842455 in words is "eight hundred forty-two thousand, four hundred fifty-five".