1122648 has 32 divisors (see below), whose sum is σ = 2905200. Its totient is φ = 361088.

The previous prime is 1122647. The next prime is 1122659. The reversal of 1122648 is 8462211.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122643) 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 7 ways as a sum of consecutive naturals, for example, 111 + ... + 1502.

2^1122648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452600).

1122648 is an abundant number, since it is smaller than the sum of its proper divisors (1782552).

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

1122648 is a wasteful number, since it uses less digits than its factorization.

1122648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1647 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 1122648 is about 1059.5508482371. The cubic root of 1122648 is about 103.9316612186.

Adding to 1122648 its reverse (8462211), we get a palindrome (9584859).

It can be divided in two parts, 1122 and 648, that added together give a triangular number (1770 = T₅₉).

The spelling of 1122648 in words is "one million, one hundred twenty-two thousand, six hundred forty-eight".