1123648 has 28 divisors (see below), whose sum is σ = 2265172. Its totient is φ = 552960.

The previous prime is 1123637. The next prime is 1123651. The reversal of 1123648 is 8463211.

It can be written as a sum of positive squares in 2 ways, for example, as 186624 + 937024 = 432^2 + 968^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6118 + ... + 6298.

It is an arithmetic number, because the mean of its divisors is an integer number (80899).

2^1123648 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 1123648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132586).

1123648 is an abundant number, since it is smaller than the sum of its proper divisors (1141524).

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

1123648 is an equidigital number, since it uses as much as digits as its factorization.

1123648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 280 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 1123648 is about 1060.0226412676. The cubic root of 1123648 is about 103.9625111429.

Adding to 1123648 its reverse (8463211), we get a palindrome (9586859).

It can be divided in two parts, 1123 and 648, that added together give a palindrome (1771).

The spelling of 1123648 in words is "one million, one hundred twenty-three thousand, six hundred forty-eight".