1123456 has 32 divisors (see below), whose sum is σ = 2288880. Its totient is φ = 549120.

The previous prime is 1123439. The next prime is 1123477. The reversal of 1123456 is 6543211.

It is a tau number, because it is divible by the number of its divisors (32).

It is a plaindrome in base 10.

It is a nialpdrome in base 8.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8511 + ... + 8641.

2^1123456 is an apocalyptic number.

1123456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144440).

1123456 is an abundant number, since it is smaller than the sum of its proper divisors (1165424).

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

1123456 is an equidigital number, since it uses as much as digits as its factorization.

1123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 200 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 1123456 is about 1059.9320732953. The cubic root of 1123456 is about 103.9565893776.

Adding to 1123456 its reverse (6543211), we get a palindrome (7666667).

The spelling of 1123456 in words is "one million, one hundred twenty-three thousand, four hundred fifty-six".