1127220 has 24 divisors (see below), whose sum is σ = 3156384. Its totient is φ = 300576.

The previous prime is 1127209. The next prime is 1127221. The reversal of 1127220 is 227211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1127220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1127221) 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, 9334 + ... + 9453.

It is an arithmetic number, because the mean of its divisors is an integer number (131516).

2^1127220 is an apocalyptic number.

1127220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1127220 is an abundant number, since it is smaller than the sum of its proper divisors (2029164).

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

1127220 is a wasteful number, since it uses less digits than its factorization.

1127220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18799 (or 18797 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1127220 is about 1061.7061740425. The cubic root of 1127220 is about 104.0725578479.

Subtracting from 1127220 its reverse (227211), we obtain a palindrome (900009).

The spelling of 1127220 in words is "one million, one hundred twenty-seven thousand, two hundred twenty".