1321104 has 40 divisors (see below), whose sum is σ = 3615840. Its totient is φ = 414208.

The previous prime is 1321093. The next prime is 1321109. The reversal of 1321104 is 4011231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1321104.

It is not an unprimeable number, because it can be changed into a prime (1321109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (90396).

2^1321104 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 1321104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1807920).

1321104 is an abundant number, since it is smaller than the sum of its proper divisors (2294736).

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

1321104 is a wasteful number, since it uses less digits than its factorization.

1321104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1641 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1321104 is about 1149.3928832214. The cubic root of 1321104 is about 109.7267044784.

Adding to 1321104 its reverse (4011231), we get a palindrome (5332335).

The spelling of 1321104 in words is "one million, three hundred twenty-one thousand, one hundred four".