1133280 has 72 divisors (see below), whose sum is σ = 3872232. Its totient is φ = 301824.

The previous prime is 1133263. The next prime is 1133287. The reversal of 1133280 is 823311.

It is a tau number, because it is divible by the number of its divisors (72).

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 (1133287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1047 + ... + 1833.

It is an arithmetic number, because the mean of its divisors is an integer number (53781).

2^1133280 is an apocalyptic number.

1133280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1133280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1936116).

1133280 is an abundant number, since it is smaller than the sum of its proper divisors (2738952).

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

1133280 is a wasteful number, since it uses less digits than its factorization.

1133280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1133280 is about 1064.5562455784. The cubic root of 1133280 is about 104.2587246636.

Adding to 1133280 its reverse (823311), we get a palindrome (1956591).

The spelling of 1133280 in words is "one million, one hundred thirty-three thousand, two hundred eighty".