1228842 has 24 divisors (see below), whose sum is σ = 2683044. Its totient is φ = 406464.

The previous prime is 1228841. The next prime is 1228849. The reversal of 1228842 is 2488221.

It can be written as a sum of positive squares in 2 ways, for example, as 1212201 + 16641 = 1101^2 + 129^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1228841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4048 + ... + 4340.

2^1228842 is an apocalyptic number.

1228842 is an abundant number, since it is smaller than the sum of its proper divisors (1454202).

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

1228842 is a wasteful number, since it uses less digits than its factorization.

1228842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 531 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 1228842 is about 1108.5314609879. The cubic root of 1228842 is about 107.1104923197.

The spelling of 1228842 in words is "one million, two hundred twenty-eight thousand, eight hundred forty-two".