1103872 has 72 divisors (see below), whose sum is σ = 2800980. Its totient is φ = 430080.

The previous prime is 1103863. The next prime is 1103873. The reversal of 1103872 is 2783011.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103873) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 100347 + ... + 100357.

2^1103872 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 1103872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400490).

1103872 is an abundant number, since it is smaller than the sum of its proper divisors (1697108).

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

1103872 is an equidigital number, since it uses as much as digits as its factorization.

1103872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1103872 is about 1050.6531302004. The cubic root of 1103872 is about 103.3489905746.

Multiplying 1103872 by its sum of digits (22), we get a square (24285184 = 4928²).

1103872 divided by its sum of digits (22) gives a square (50176 = 224²).

Adding to 1103872 its reverse (2783011), we get a palindrome (3886883).

The spelling of 1103872 in words is "one million, one hundred three thousand, eight hundred seventy-two".