1122240 has 112 divisors (see below), whose sum is σ = 4096512. Its totient is φ = 254976.

The previous prime is 1122227. The next prime is 1122241. The reversal of 1122240 is 422211.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122241) 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, 6637 + ... + 6803.

It is an arithmetic number, because the mean of its divisors is an integer number (36576).

2^1122240 is an apocalyptic number.

1122240 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 1122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048256).

1122240 is an abundant number, since it is smaller than the sum of its proper divisors (2974272).

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

1122240 is a wasteful number, since it uses less digits than its factorization.

1122240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1122240 is about 1059.3582963285. The cubic root of 1122240 is about 103.9190691874.

Adding to 1122240 its reverse (422211), we get a palindrome (1544451).

The spelling of 1122240 in words is "one million, one hundred twenty-two thousand, two hundred forty".