1113220 has 12 divisors (see below), whose sum is σ = 2337804. Its totient is φ = 445280.

The previous prime is 1113199. The next prime is 1113221. The reversal of 1113220 is 223111.

It can be written as a sum of positive squares in 2 ways, for example, as 352836 + 760384 = 594^2 + 872^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1113197 and 1113206.

It is not an unprimeable number, because it can be changed into a prime (1113221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27811 + ... + 27850.

It is an arithmetic number, because the mean of its divisors is an integer number (194817).

2^1113220 is an apocalyptic number.

1113220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1113220 is an abundant number, since it is smaller than the sum of its proper divisors (1224584).

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

1113220 is a wasteful number, since it uses less digits than its factorization.

1113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55670 (or 55668 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1113220 is about 1055.0924130141. The cubic root of 1113220 is about 103.6399035324.

Adding to 1113220 its reverse (223111), we get a palindrome (1336331).

It can be divided in two parts, 11 and 13220, that added together give a palindrome (13231).

The spelling of 1113220 in words is "one million, one hundred thirteen thousand, two hundred twenty".