1381104 has 80 divisors (see below), whose sum is σ = 4166400. Its totient is φ = 437184.

The previous prime is 1381103. The next prime is 1381109. The reversal of 1381104 is 4011831.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9867 + ... + 10005.

It is an arithmetic number, because the mean of its divisors is an integer number (52080).

2^1381104 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 1381104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2083200).

1381104 is an abundant number, since it is smaller than the sum of its proper divisors (2785296).

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

1381104 is a wasteful number, since it uses less digits than its factorization.

1381104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1381104 is about 1175.2038121109. The cubic root of 1381104 is about 111.3633092061.

Adding to 1381104 its reverse (4011831), we get a palindrome (5392935).

It can be divided in two parts, 1381 and 104, that added together give a triangular number (1485 = T₅₄).

The spelling of 1381104 in words is "one million, three hundred eighty-one thousand, one hundred four".