842245 has 4 divisors (see below), whose sum is σ = 1010700. Its totient is φ = 673792.

The previous prime is 842209. The next prime is 842249. The reversal of 842245 is 542248.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 146689 + 695556 = 383^2 + 834^2 .

It is a cyclic number.

It is not a de Polignac number, because 842245 - 2¹¹ = 840197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842249) 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, 84220 + ... + 84229.

It is an arithmetic number, because the mean of its divisors is an integer number (252675).

2⁸⁴²²⁴⁵ is an apocalyptic number.

It is an amenable number.

842245 is a deficient number, since it is larger than the sum of its proper divisors (168455).

842245 is a wasteful number, since it uses less digits than its factorization.

842245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168454.

The product of its digits is 2560, while the sum is 25.

The square root of 842245 is about 917.7390696707. The cubic root of 842245 is about 94.4378621582.

The spelling of 842245 in words is "eight hundred forty-two thousand, two hundred forty-five".