1123904 has 28 divisors (see below), whose sum is σ = 2363724. Its totient is φ = 528384.

The previous prime is 1123901. The next prime is 1123909. The reversal of 1123904 is 4093211.

It can be written as a sum of positive squares in 2 ways, for example, as 1000000 + 123904 = 1000^2 + 352^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572 + ... + 1604.

2^1123904 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 1123904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181862).

1123904 is an abundant number, since it is smaller than the sum of its proper divisors (1239820).

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

1123904 is a wasteful number, since it uses less digits than its factorization.

1123904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1123904 is about 1060.1433865284. The cubic root of 1123904 is about 103.9704057807.

The spelling of 1123904 in words is "one million, one hundred twenty-three thousand, nine hundred four".