1281104 has 40 divisors (see below), whose sum is σ = 2812320. Its totient is φ = 560000.

The previous prime is 1281101. The next prime is 1281131. The reversal of 1281104 is 4011821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281101) 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, 4979 + ... + 5229.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2^1281104 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 1281104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1406160).

1281104 is an abundant number, since it is smaller than the sum of its proper divisors (1531216).

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

1281104 is a wasteful number, since it uses less digits than its factorization.

1281104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1281104 is about 1131.8586484186. The cubic root of 1281104 is about 108.6079114961.

Adding to 1281104 its reverse (4011821), we get a palindrome (5292925).

The spelling of 1281104 in words is "one million, two hundred eighty-one thousand, one hundred four".