842215 has 8 divisors (see below), whose sum is σ = 1102608. Its totient is φ = 612480.

The previous prime is 842209. The next prime is 842249. The reversal of 842215 is 512248.

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

It is not a de Polignac number, because 842215 - 2⁵ = 842183 is a prime.

It is a super-2 number, since 2×842215² = 1418652212450, which contains 22 as substring.

It is a Duffinian number.

842215 is a lucky 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 7 ways as a sum of consecutive naturals, for example, 7602 + ... + 7711.

It is an arithmetic number, because the mean of its divisors is an integer number (137826).

2⁸⁴²²¹⁵ is an apocalyptic number.

842215 is a deficient number, since it is larger than the sum of its proper divisors (260393).

842215 is a wasteful number, since it uses less digits than its factorization.

842215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15329.

The product of its digits is 640, while the sum is 22.

The square root of 842215 is about 917.7227250101. The cubic root of 842215 is about 94.4367408813.

The spelling of 842215 in words is "eight hundred forty-two thousand, two hundred fifteen".