842225 has 12 divisors (see below), whose sum is σ = 1063920. Its totient is φ = 661200.

The previous prime is 842209. The next prime is 842249. The reversal of 842225 is 522248.

It is not a de Polignac number, because 842225 - 2⁴ = 842209 is a prime.

Its product of digits (1280) is a multiple of the sum of its prime factors (640).

It is a self number, because there is not a number n which added to its sum of digits gives 842225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1190 + ... + 1760.

It is an arithmetic number, because the mean of its divisors is an integer number (88660).

2⁸⁴²²²⁵ is an apocalyptic number.

It is an amenable number.

842225 is a deficient number, since it is larger than the sum of its proper divisors (221695).

842225 is a wasteful number, since it uses less digits than its factorization.

842225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 635 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 842225 is about 917.7281732626. The cubic root of 842225 is about 94.4371146432.

Adding to 842225 its sum of digits (23), we get a palindrome (842248).

The spelling of 842225 in words is "eight hundred forty-two thousand, two hundred twenty-five".