1123400 has 48 divisors (see below), whose sum is σ = 2695140. Its totient is φ = 435200.

The previous prime is 1123399. The next prime is 1123403. The reversal of 1123400 is 43211.

It is a happy number.

1123400 is nontrivially palindromic in base 3 and base 9.

It can be written as a sum of positive squares in 6 ways, for example, as 174724 + 948676 = 418^2 + 974^2 .

It is a plaindrome in base 16.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8132 + ... + 8268.

2^1123400 is an apocalyptic number.

1123400 is a gapful number since it is divisible by the number (10) 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 1123400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347570).

1123400 is an abundant number, since it is smaller than the sum of its proper divisors (1571740).

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

1123400 is a wasteful number, since it uses less digits than its factorization.

1123400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1123400 is about 1059.9056561789. The cubic root of 1123400 is about 103.9548620689.

Adding to 1123400 its reverse (43211), we get a palindrome (1166611).

The spelling of 1123400 in words is "one million, one hundred twenty-three thousand, four hundred".