1211120 has 20 divisors (see below), whose sum is σ = 2816040. Its totient is φ = 484416.

The previous prime is 1211087. The next prime is 1211141. The reversal of 1211120 is 211121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 1211098 and 1211107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7490 + ... + 7649.

It is an arithmetic number, because the mean of its divisors is an integer number (140802).

2^1211120 is an apocalyptic number.

1211120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211120 is an abundant number, since it is smaller than the sum of its proper divisors (1604920).

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

1211120 is a wasteful number, since it uses less digits than its factorization.

1211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15152 (or 15146 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1211120 is about 1100.5089731574. The cubic root of 1211120 is about 106.5930916232.

Adding to 1211120 its reverse (211121), we get a palindrome (1422241).

Subtracting from 1211120 its reverse (211121), we obtain a palindrome (999999).

It can be divided in two parts, 1211 and 120, that added together give a palindrome (1331).

The spelling of 1211120 in words is "one million, two hundred eleven thousand, one hundred twenty".